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34 Commits

Author SHA1 Message Date
043c5201d2 Integrate Obsidian with the site and track its settings 2022-05-01 16:08:06 -06:00
6730b1e54e Update android note 2022-03-27 09:04:34 +00:00
ec46e78628 Fix links 2022-03-27 09:04:23 +00:00
1e9a9f6766 Add sensors, switch t0 font 2022-03-27 09:03:46 +00:00
20e58cd15f Remove buttons from articles, move return to home 2022-03-27 09:02:54 +00:00
64f9f490ad Add articles 2022-02-27 23:59:21 +00:00
42cbd0e54a Add subpages, and wine crate coffee table 2022-02-14 23:01:50 +00:00
25a2de77a1 Remove colons, save 4 bytes 2022-02-12 22:36:15 +00:00
3e2f9c0684 Rotate emails, minimize lite 2022-01-10 07:56:09 +00:00
1c3ae5b8f8 Make article links single-character 2021-10-14 07:47:43 +00:00
afcf272607 Add text files 2021-10-14 07:42:11 +00:00
3059c14648 Add page full of text files 2021-10-14 06:41:18 +00:00
7c059148d5 Minify lite index even more 2021-10-14 06:30:54 +00:00
023e99436e Change "non-free" to "proprietary" 2021-10-05 04:54:51 +00:00
d87e798d38 Add link to guest book, optimize 2021-10-05 04:54:37 +00:00
20b46d3b02 Remove extra characters, improve article css 2021-08-20 09:38:28 +00:00
052a919f12 Make project urls shorter 2021-08-20 08:47:50 +00:00
035a3c2110 Add style to articles 2021-07-27 03:56:42 +00:00
2ca498cf20 Make even more minimal 2021-07-27 03:56:28 +00:00
efecc52605 Make site even smaller 2021-07-27 03:51:36 +00:00
1e4baa950f Remove category template 2021-07-26 23:27:22 +00:00
8f5f042794 Trim down lite version even more 2021-07-26 19:22:05 +00:00
600cc9e51f Add lite version of website 2021-07-26 18:42:50 +00:00
65b3ad7fbf Rename Projects category to Creations 2021-07-25 22:40:04 +00:00
a966b59b66 Add prototype 2021-07-25 15:42:17 -06:00
bfc93af28f Optimize me.jpg 2021-07-25 08:54:05 +00:00
7a73eafa85 Add robots.txt 2021-07-25 08:53:52 +00:00
9f90810e0f Remove custom font files 2021-07-23 13:14:56 +00:00
dca5d47578 Remove custom fonts from CSS 2021-07-23 13:11:13 +00:00
495f964297 Add webring 2021-07-23 12:57:02 +00:00
f234121e3f Add corrections to bypassing ports 2021-07-23 12:56:38 +00:00
f76b8e7bf4 Move source code links beside titles 2021-06-16 07:41:26 +00:00
2c5c0750bf Remove unused PHP 2021-06-16 07:40:00 +00:00
bda333c88a Add writing to home page 2021-06-16 07:36:09 +00:00
94 changed files with 1931 additions and 669 deletions

9
content/.obsidian/app.json vendored Normal file
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@@ -0,0 +1,9 @@
{
"spellcheck": true,
"autoPairBrackets": false,
"autoPairMarkdown": false,
"vimMode": true,
"useMarkdownLinks": false,
"attachmentFolderPath": "media",
"alwaysUpdateLinks": true
}

4
content/.obsidian/appearance.json vendored Normal file
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@@ -0,0 +1,4 @@
{
"theme": "moonstone",
"baseFontSize": 16
}

16
content/.obsidian/core-plugins.json vendored Normal file
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@@ -0,0 +1,16 @@
[
"file-explorer",
"global-search",
"switcher",
"graph",
"backlink",
"page-preview",
"note-composer",
"command-palette",
"editor-status",
"markdown-importer",
"outline",
"word-count",
"open-with-default-app",
"file-recovery"
]

1
content/.obsidian/hotkeys.json vendored Normal file
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@@ -0,0 +1 @@
{}

112
content/.obsidian/workspace vendored Normal file
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@@ -0,0 +1,112 @@
{
"main": {
"id": "69e9da393623ab60",
"type": "split",
"children": [
{
"id": "642564a28e60933d",
"type": "leaf",
"state": {
"type": "markdown",
"state": {
"file": "Protospace.md",
"mode": "source"
}
}
}
],
"direction": "vertical"
},
"left": {
"id": "3885f82c1ab72e1b",
"type": "split",
"children": [
{
"id": "0e37795504669957",
"type": "tabs",
"children": [
{
"id": "e5f5df16367f5f9a",
"type": "leaf",
"state": {
"type": "file-explorer",
"state": {}
}
},
{
"id": "15b64333baa0fbc2",
"type": "leaf",
"state": {
"type": "search",
"state": {
"query": "",
"matchingCase": false,
"explainSearch": false,
"collapseAll": false,
"extraContext": false,
"sortOrder": "alphabetical"
}
}
}
]
}
],
"direction": "horizontal",
"width": 300
},
"right": {
"id": "260bba8f76f307a9",
"type": "split",
"children": [
{
"id": "21c556d6660f839b",
"type": "tabs",
"children": [
{
"id": "528c8f9657044ea2",
"type": "leaf",
"state": {
"type": "backlink",
"state": {
"file": "Protospace.md",
"collapseAll": false,
"extraContext": false,
"sortOrder": "alphabetical",
"showSearch": false,
"searchQuery": "",
"backlinkCollapsed": false,
"unlinkedCollapsed": true
}
}
},
{
"id": "79f3ff4100fe3ae6",
"type": "leaf",
"state": {
"type": "outline",
"state": {
"file": "Protospace.md"
}
}
}
],
"currentTab": 1
}
],
"direction": "horizontal",
"width": 300
},
"active": "642564a28e60933d",
"lastOpenFiles": [
"Protospace.md",
"Plant Waterer.md",
"media/protospace2.png",
"media/protospace1.png",
"Solar Car.md",
"Acousting Panels.md",
"Backup Strategy.md",
"Bypassing Ports.md",
"Garage Door Opener.md",
"Painting.md"
]
}

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@@ -0,0 +1,25 @@
Title: Theatre Acoustic Panels
Date: 2021-10-21
Category: Creations
Summary: Panels for acoustic treatment in my home theatre.
Short: 3
Acoustic treatment is one of the most overlooked aspects of home audio. There's no point in spending money on premium speakers if the room they are playing in has poor acoustics.
The primary purpose of acoustic panels is to reduce the reverberations caused by sound reflecting off the smooth walls of the theatre. The path of the reflected sound is a longer distance to your ear compared to the sound coming directly from the speaker. This causes the reflected sound to be delayed by the time it reaches your ear. The delayed signal interferes with itself, causing comb filtering which distorts the signal.
Acoustic panels are placed geometrically where the sound from the speakers would reflect off the wall to reach the listener's ears. The insulation inside the panels absorbs energy from the soundwave which reduces its volume and interference.
![[ panel1.jpg | twelve L-shaped corners of the panels stacked together leaning on a table saw in a wood shop]]
I made six frames in the wood shop of my local makerspace, Protospace. After cutting the 1x4" pine boards to length, I made a jig so I could quickly join them together with screws.
![[ panel2.jpg | a panel with insulation inside on the ground about to be wrapped with black fabric]]
I added 4" batts of Rockwool insulation into each frame after it was assembled. I then wrapped the frame with black speaker fabric and stabled it in place while trying to pull it taut.
I sat in my theatre while a friend slid a handheld mirror along the wall until I could see the middle of the speaker in its reflection. This told me the centre point of where to mount each panel because the reflected sound would take the same path to my ear.
<span class="aside">Four in the front, two in the back</span>
![[panel3.jpg | four black acoustic panels mounted on the walls in my home theatre]]

View File

@@ -3,52 +3,37 @@ Date: 2021-04-08
Category: Writing
Summary: Details about the backup system for all of my data.
Wide: true
Short: 1
[TOC]
Regularly backing up all the data I care about is very important to me. This
article outlines my strategy to make sure I never lose essential data.
Regularly backing up all the data I care about is very important to me. This article outlines my strategy to make sure I never lose essential data.
## Motivation
Backups should be as automatic as possible. This ensures laziness and
forgetfulness won't interfere with the regularity.
Backups should be as automatic as possible. This ensures laziness and forgetfulness won't interfere with the regularity.
All software used to create and store the backups should be free and open source
so I'm not depending on the survival of a company.
All software used to create and store the backups should be free and open source so I'm not depending on the survival of a company.
Backups need to be tested to ensure they are correct and happening regularly.
Multiple copies of the backups should exist, including at least one offsite to
protect against my building burning down.
Backups need to be tested to ensure they are correct and happening regularly. Multiple copies of the backups should exist, including at least one offsite to protect against my building burning down.
Backups should also be incremental when possible (rather than mirror copies) so
an accidental deletion isn't propagated into the backups, making the file
irrecoverable.
Backups should also be incremental when possible (rather than mirror copies) so an accidental deletion isn't propagated into the backups, making the file irrecoverable.
## Strategy
I have one backup folder `/mnt/backup` on my media server at home that serves as
the destination for all my backup sources. All scheduled automatic backups write
to their own subfolder inside of it.
I have one backup folder `/mnt/backup` on my media server at home that serves as the destination for all my backup sources. All scheduled automatic backups write to their own subfolder inside of it.
This backup folder is then synced to encrypted 2.5" 1 TB hard drives which I
rotate between my bag, offsite, and my parents' house.
This backup folder is then synced to encrypted 2.5" 1 TB hard drives which I rotate between my bag, offsite, and my parents' house.
## Backup Sources
I use the tool `rdiff-backup` extensively because it allows me to take
incremental backups locally or over SSH. It acts very similar to `rsync` and has
no configuration.
I use the tool `rdiff-backup` extensively because it allows me to take incremental backups locally or over SSH. It acts very similar to `rsync` and has no configuration.
### Email
I have every email since 2010 backed up continuously in case my email provider
disappears.
I have every email since 2010 backed up continuously in case my email provider disappears.
I use `offlineimap` to sync my mail to the directory `~/email` on my media
server as a Maildir. Since offlineimap is only a syncing tool, the emails need
to be copied elsewhere to be backed up. I run `rdiff-backup` from a weekly cron
job:
I use `offlineimap` to sync my mail to the directory `~/email` on my media server as a Maildir. Since offlineimap is only a syncing tool, the emails need to be copied elsewhere to be backed up. I run `rdiff-backup` from a weekly cron job:
<span class="aside">I'll explain what backup_check.txt does below</span>
@@ -83,9 +68,7 @@ sslcacertfile = /etc/ssl/certs/ca-certificates.crt
### Notes
I use Standard Notes to take notes and wrote the tool
[standardnotes-fs](https://github.com/tannercollin/standardnotes-fs) to mount my
notes as a file system to view and edit them as plain text files.
I use Standard Notes to take notes and wrote the tool [standardnotes-fs](https://github.com/tannercollin/standardnotes-fs) to mount my notes as a file system to view and edit them as plain text files.
I take weekly backups of the mounted file system on my media server with cron:
@@ -96,9 +79,7 @@ I take weekly backups of the mounted file system on my media server with cron:
### Nextcloud
I self-host a Nextcloud instance to store all my personal documents (non-code
projects, tax forms, spreadsheets, etc.). Since it's only a syncing software,
the files need to be copied elsewhere to be backed up.
I self-host a Nextcloud instance to store all my personal documents (non-code projects, tax forms, spreadsheets, etc.). Since it's only a syncing software, the files need to be copied elsewhere to be backed up.
I take weekly backups of the Nextcloud data folder with cron:
@@ -109,9 +90,7 @@ I take weekly backups of the Nextcloud data folder with cron:
### Gitea
I self-host a Gitea instance to store all my git repositories for code-based
projects. My home folder is also a git repo so I can easily sync my config files
and password database between servers and machines.
I self-host a Gitea instance to store all my git repositories for code-based projects. My home folder is also a git repo so I can easily sync my config files and password database between servers and machines.
I take weekly backups of the Gitea data folder with cron:
@@ -123,36 +102,23 @@ I take weekly backups of the Gitea data folder with cron:
### Telegram
Telegram Messenger is my main app for communication. My parents, most of my
friends, and friend groups are on there so I don't want to lose those messages
in case Telegram disappears or my account gets banned.
Telegram Messenger is my main app for communication. My parents, most of my friends, and friend groups are on there so I don't want to lose those messages in case Telegram disappears or my account gets banned.
<span class="aside">Saves the messages to a sqlite db</span>
Telegram includes a data export feature, but it can't be automated. Instead I
run the deprecated software
[telegram-export](https://github.com/expectocode/telegram-export) hourly with
cron:
Telegram includes a data export feature, but it can't be automated. Instead I run the deprecated software [telegram-export](https://github.com/expectocode/telegram-export) hourly with cron:
```
0 * * * * bash -c 'timeout 50m /home/tanner/opt/telegram-export/env/bin/python -m telegram_export' > /var/log/telegramexport.log 2>&1
```
It likes to hang, so `timeout` kills it if it's still running after 50 minutes.
Hasn't corrupted the database yet.
It likes to hang, so `timeout` kills it if it's still running after 50 minutes. Hasn't corrupted the database yet.
### Phone
[Signal
Messenger](https://play.google.com/store/apps/details?id=org.thoughtcrime.securesms&hl=en_CA&gl=US)
automatically exports a copy of my text messages database, and
[Aegis](https://play.google.com/store/apps/details?id=com.beemdevelopment.aegis&hl=en_CA&gl=US)
allows me to export an encrypted JSON file of my two-factor authentication
codes.
[Signal Messenger](https://play.google.com/store/apps/details?id=org.thoughtcrime.securesms&hl=en_CA&gl=US) automatically exports a copy of my text messages database, and [Aegis](https://play.google.com/store/apps/details?id=com.beemdevelopment.aegis&hl=en_CA&gl=US) allows me to export an encrypted JSON file of my two-factor authentication codes.
I mount my phone's internal storage as a file system on my desktop using
[adbfs-rootless](https://github.com/spion/adbfs-rootless). I then rsync the
files over to my media server:
I mount my phone's internal storage as a file system on my desktop using [adbfs-rootless](https://github.com/spion/adbfs-rootless). I then rsync the files over to my media server:
```
$ ./adbfs ~/mntphone
@@ -166,23 +132,17 @@ $ time rsync -Wav \
localmediaserver:/mnt/backup/files/phone/
```
Unfortunately this is a manual process because I need to plug my phone in each
time. Ideally it would happen automatically while I'm asleep and the phone is
charging.
Unfortunately this is a manual process because I need to plug my phone in each time. Ideally it would happen automatically while I'm asleep and the phone is charging.
### Miscellaneous Files
The directory `/backup/files` is a repository for any kind of files I want to
keep forever. My phone data, old archives, computer files, Minecraft worlds,
files from previous jobs, and so on.
The directory `/backup/files` is a repository for any kind of files I want to keep forever. My phone data, old archives, computer files, Minecraft worlds, files from previous jobs, and so on.
All the files will be included in the 1 TB hard drive backup rotations.
### Web Services
Web services that I run like [txt.t0.vc](https://txt.t0.vc) and
[QotNews](https://news.t0.vc) are backed up daily, weekly, and monthly depending
on how frequently the data changes.
Web services that I run like [txt.t0.vc](https://txt.t0.vc) and [QotNews](https://news.t0.vc) are backed up daily, weekly, and monthly depending on how frequently the data changes.
I run `rdiff-backup` on the remote server with cron:
@@ -199,17 +159,13 @@ I run `rdiff-backup` on the remote server with cron:
55 14 1 * * rdiff-backup --remove-older-than 12B --force tbotbak@remotebackup::/mnt/backup/remote/tbotbak/monthly/t0txt/
```
The `tbotbak` user has write access to the `/mnt/backup/remote/tbotbak`
directory only. It has its own passwordless SSH key that's only permitted to run
the `rdiff-backup --server` command for security.
The `tbotbak` user has write access to the `/mnt/backup/remote/tbotbak` directory only. It has its own passwordless SSH key that's only permitted to run the `rdiff-backup --server` command for security.
### Protospace
I run a lot of services for [Protospace](https://protospace.ca/), my city's
makerspace.
I run a lot of services for [Protospace](https://protospace.ca/), my city's makerspace.
The member portal I wrote called [Spaceport](https://my.protospace.ca/) creates
an archive I download daily:
The member portal I wrote called [Spaceport](https://my.protospace.ca/) creates an archive I download daily:
```
40 10 * * * wget --content-disposition \
@@ -219,8 +175,7 @@ an archive I download daily:
https://api.my.protospace.ca/backup/
```
The website and [wiki](https://wiki.protospace.ca) that I sysadmin get
backed up weekly:
The website and [wiki](https://wiki.protospace.ca) that I sysadmin both get backed up weekly:
```
0 12 * * 1 mysqldump --all-databases > /var/www/dump.sql
@@ -228,9 +183,7 @@ backed up weekly:
20 12 * * 1 rdiff-backup /var/www pshostbak@remotebackup::/mnt/backup/remote/pshostbak/weekly/www/
```
The Protospace [Minecraft
server](http://games.protospace.ca:8123/?worldname=world&mapname=flat&zoom=3&x=74&y=64&z=354)
I run gets backed up daily:
The Protospace [Minecraft server](http://games.protospace.ca:8123/?worldname=world&mapname=flat&zoom=3&x=74&y=64&z=354) I run gets backed up daily:
```
00 15 * * * date -Iseconds > /home/tanner/minecraft/backup_check.txt
@@ -270,8 +223,7 @@ My backup folder `/mnt/backup` now looks like this:
└── telebak
```
This directory tree is the master backup and I make a copy of the entire tree
every Saturday to a hard drive.
This directory tree is the master backup and I make a copy of the entire tree every Saturday to a hard drive.
The directory is copied over with the following script:
@@ -291,32 +243,17 @@ umount /mnt/external
cryptsetup luksClose external
```
I wrote a Python script `checkbackup.py` that goes through each backup and
compares the timestamp in `backup_check.txt` files to the current time. This
makes sure that the cron ran, backups were taken, and transferred over
correctly.
I wrote a Python script `checkbackup.py` that goes through each backup and compares the timestamp in `backup_check.txt` files to the current time. This makes sure that the cron ran, backups were taken, and transferred over correctly.
## Rotating Hard Drives
I rotate through 2.5" 1 TB hard drives each Saturday when I do a backup. They
are quite cheap at [$65 CAD](https://www.memoryexpress.com/Products/MX65194)
each so I can have a bunch floating around.
I rotate through 2.5" 1 TB hard drives each Saturday when I do a backup. They are quite cheap at [$65 CAD](https://www.memoryexpress.com/Products/MX65194) each so I can have a bunch floating around.
I keep one connected to the server, one in my bag, one offsite, one at my mother's house, and one at my dad's house. Every Saturday I run the script above to take a copy and then swap the drive with the one in my bag. It then gets <span class="aside">I go back home about twice per year</span> swapped when I visit my offsite location. Same for when I visit my parents. This means that all hard drives eventually get rotated through with new data and don't sit too long unpowered.
I keep one connected to the server, one in my bag, one offsite, one at my
mother's house, and one at my dad's house. Every Saturday I run the script above
to take a copy and then swap the drive with the one in my bag. It then gets
<span class="aside">I go back home about twice per year</span>
swapped when I visit my offsite location. Same for when I visit my parents. This
means that all hard drives eventually get rotated through with new data and
don't sit too long unpowered.
The drives are all encrypted with full-disk LUKS encryption using a password I'm unlikely to forget.
The drives are all encrypted with full-disk LUKS encryption using a password I'm
unlikely to forget.
I run the check-summing `btrfs` file system on them in RAID-1 to protect against
bitrot. This means I can only use 0.5 TB of storage for my backups, but the data
is stored redundantly.
I run the check-summing `btrfs` file system on them in RAID-1 to protect against bitrot. This means I can only use 0.5 TB of storage for my backups, but the data is stored redundantly.
Here's how I set up new hard drives to do this:
@@ -332,12 +269,8 @@ $ sudo cryptsetup luksClose external
## Future Improvements
I'm working on a system to automatically back up all my home directories to my
media server. I need this to grab Bash histories and code that's
work-in-progress. I've been burned by not having this once when a server died.
I'm working on a system to automatically back up all my home directories to my media server. I need this to grab Bash histories and code that's work-in-progress. I've been burned by not having this once when a server died.
I'd like to automate backing up my phone by connecting it to a Raspberry Pi when
I go to sleep.
I'd like to automate backing up my phone by connecting it to a Raspberry Pi when I go to sleep.
I need to get better at fully testing my backups by restoring them on a blank
machine.
I need to get better at fully testing my backups by restoring them on a blank machine.

View File

@@ -3,33 +3,25 @@ Date: 2021-04-10
Category: Writing
Summary: Bypass ISP blocked ports using VPN port forwarding for public access.
Wide: true
Short: 2
[TOC]
My residential ISP blocks inbound traffic to common ports like 22, 80, and 443.
I use an OpenVPN tunnel to forward these ports so that I can self-host a
public media server. It does __not__ require users to be on the VPN.
My residential ISP blocks inbound traffic to common ports like 22, 80, and 443. I use an OpenVPN tunnel to forward these ports so that I can self-host a public media server. It does __not__ require users to be on the VPN.
This article explains how I set it up and is targeted towards Linux sysadmins.
## Overview
I have a cheap $5 per month virtual server with [Digital
Ocean](https://digitalocean.com) that runs Debian GNU/Linux 10. An OpenVPN
server is running on this virtual server.
I have a cheap $5 per month virtual server with [Digital Ocean](https://digitalocean.com) that runs Debian GNU/Linux 10. An OpenVPN server is running on this virtual server.
My media server at home has an OpenVPN client connected to the server and is
assigned a static IP on the VPN network.
My media server at home has an OpenVPN client connected to the server and is assigned a static IP on the VPN network.
The virtual server has routing enabled and forwards inbound traffic __from the
internet__ to my media server at home. This allows me to have external HTTP and SSH
access.
The virtual server has routing enabled and forwards inbound traffic __from the internet__ to my media server at home. This allows me to have external HTTP and SSH access.
## Server Setup
Spin up a Debian 10 virtual server on your favourite hosting provider and set
your user up as you would normally. You should probably harden this server.
Assign a subdomain to it like `vpn.example.com`.
Spin up a Debian 10 virtual server on your favourite hosting provider and set your user up as you would normally. You should probably harden this server. Assign a subdomain to it like `vpn.example.com`.
Install the following requirements:
@@ -40,8 +32,7 @@ $ sudo apt install openvpn ufw
### OpenVPN Server
These steps roughly follow [this
guide](https://wiki.debian.org/OpenVPN#TLS-enabled_VPN).
These steps roughly follow [this guide](https://wiki.debian.org/OpenVPN#TLS-enabled_VPN).
Generate TLS certificates and keys:
@@ -52,7 +43,7 @@ $ sudo make-cadir easy-rsa/
$ sudo chown -R tanner:tanner easy-rsa/
```
Replace `tanner` with your own username, this is temporary.
Replace `tanner` with your Linux username, this is temporary.
<span class="aside">The `.rnd` file prevents a warning</span>
@@ -63,8 +54,7 @@ $ head /dev/urandom > pki/.rnd
$ ./easyrsa build-ca
```
Enter a password you won't forget in case you want to add another client later.
The Common Name you choose is not important.
Enter a password you won't forget in case you want to add another client later. The Common Name you choose is not important.
Generate DiffieHellman params:
@@ -84,18 +74,15 @@ Generate a client cert:
$ ./easyrsa build-client-full mediaserver nopass
```
We make a `mediaserver` client because we want to assign a static IP to it. You
need to make a different one for each client you want with a static IP.
We make a `mediaserver` client because we want to assign a static IP to it. You need to make a different one for each client you want with a static IP.
Also, if you want generic clients that all get dynamic IPs for use on your
laptop, phone, etc. to protect you from public WiFi, create only a single extra one:
Also, if you want generic clients that all get dynamic IPs for use on your laptop, phone, etc. to protect you from public WiFi (like a normal VPN), create only a single extra one:
```
$ ./easyrsa build-client-full client nopass # optional
```
Leave off `nopass` if you want to password protect the config file keys when you
set up a new client.
Leave off `nopass` if you want to password protect the config file keys when you set up a new client.
Create the server config file `/etc/openvpn/server.conf`:
@@ -181,8 +168,7 @@ $ ip addr
### Port Forwarding
I use `ufw` to handle the iptables rules because I use it anyway as a firewall
when I harden my servers.
I use `ufw` to handle the iptables rules because I use it anyway as a firewall when I harden my servers.
Enable routing:
@@ -217,14 +203,11 @@ Add this to the top of `/etc/ufw/before.rules`:
COMMIT
```
Replace `123.123.123.123` with your VPN server's external IP address and `eth0`
with the external interface.
Replace `123.123.123.123` with your VPN server's external IP address and `eth0` with the external interface.
This will forward TCP traffic on port 2222 to your home server. If you want to use
port 22, then you need to set the VPN SSH server to something else.
This will forward TCP traffic on port 2222 to your home server. If you want to use port 22, then you need to set the VPN SSH server to something else.
A full example of `/etc/ufw/before.rules` with other ports included can be found
here:
A full example of `/etc/ufw/before.rules` with other ports included can be found here:
[https://txt.t0.vc/URUG](https://txt.t0.vc/URUG)
@@ -277,8 +260,7 @@ key-direction 1
</tls-auth>
```
Replace the `[server ...]` lines with the contents of that file on the __VPN
server__, for example:
Replace the `[server ...]` lines with the contents of that file on the __VPN server__, for example:
```
$ sudo cat /etc/openvpn/easy-rsa/pki/ca.crt
@@ -364,22 +346,17 @@ $ sudo service openvpn restart
### Client Apps
On Android I use "OpenVPN for Android" and on Linux I use the
`network-manager-openvpn-gnome` Debian package.
On Android I use "OpenVPN for Android" and on Linux I use the `network-manager-openvpn-gnome` Debian package.
To add your VPN on Gnome, open VPN settings, import file, and select
`client.ovpn`. If the private key is missing, select it from
`~/.cert/nm-openvpn/`.
To add your VPN on Gnome, open VPN settings, import file, and select `client.ovpn`. If the private key is missing, select it from `~/.cert/nm-openvpn/`.
## Closing Thoughts
You should now be fine to access your home server from over the internet.
To forward additional ports, just edit the `/etc/ufw/before.rules` file like
above.
To forward additional ports, just edit the `/etc/ufw/before.rules` file like above and apply the changes to `ufw`.
You can now point a domain to your virtual server's IP and use that to connect
to your home server. Use a CNAME to make it easy to change later:
You can now point a domain to your virtual server's IP and use that to connect to your home server. Use a CNAME to make it easy to change later:
```
NAME TYPE VALUE
@@ -388,5 +365,4 @@ vpn.example.com. A 123.123.123.123
myserver.example.com. CNAME vpn.example.com.
```
Finally, make sure any server programs are listening / bound to `10.8.0.100` or
`0.0.0.0` so that they can get traffic from that interface.
Finally, make sure any server programs are listening / bound to `10.8.0.100` or `0.0.0.0` so that they can get traffic from that interface.

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Title: Garage Door Opener Hack
Date: 2021-12-26
Category: Creations
Summary: Hacking my garage door opener to work over Wifi.
Short: 5
In the quest to automate as much of my house as possible, I thought it would be useful to be able to remotely control my garage door from my home automation system. If I suspected that I forgot to close it while leaving, I could check in my security cameras and then close it from anywhere. It's nice having this peace of mind, even if it almost never happens.
Instead of reverse engineering the wireless protocol, cracking the encryption, and sending my own commands, I figured it would be much easier to hack the hardware. I cracked open a spare remote to find that it contained a basic PCB with simple tactile switches.
![[garage1.jpg | the six parts of the spare remote on my desk: metal clip, plastic buttons, battery, PCB, and two halves of the case]]
My plan was to solder an Arduino controlled relay in parallel with the button that toggled the garage door. I would also power the remote from the 3 V pin. I soldered four wires on to the appropriate pins.
![[garage2.jpg | a closeup of the green PCB with two wires soldered to the battery terminals and two to the button pins]]
I drilled a hole in the plastic case and routed the wires through it while reassembling the remote. It's connected to an Adafruit ESP8266 Arduino with a relay module shield.
The Arduino joins my isolated home automation Wifi network and connects over MQTT, a simple messaging protocol, to my automation server. When it receives a command over MQTT it toggles the relay on for a quarter of a second and then off, simulating a button press.
![[garage3.jpg | the completed system: an arduino with a white relay and wires leading to the reassembled garage door remote]]
Update: this system has been flawless for two months now. It's worked every time I've tried to toggle the door and has never opened by mistake.

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Title: Hand of Ozymandias
Date: 2012-03-23
Category: Creations
Summary: A withered hand I welded out of scrap metal.
Short: hand
I was visiting my cousins in Radium, BC and decided to learn stick welding at their shop. I wanted to create a sculpture, so with pieces of scrap metal I welded together this hand. The beads are far from perfect. Working with small pieces of rusted metal made it difficult.
![[hand1.jpg | a rusted hand welded together out of scrap square stock metal tubing]]
## The Name
One of my favourite poems is [Ozymandias](https://en.wikipedia.org/wiki/Ozymandias) by Percy Bysshe Shelley. It's about the inevitable complete decline of all rulers and the empires they build, however mighty in their time. This is the hand of Ozymandias sticking out from the sand, grasping for life after he has been reduced to dust.
## Construction
I eyeballed the joint angles and my cousin cut them to spec with an angle grinder. It was made in a machine shop with no real planning done ahead of time. In between welds, I used my own hand as a reference. Below is a picture of me adding a bead to it.
![[hand2.jpg | me welding the hand causing a very bright white light that washes out the photo]]

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Title: LED Dress
Date: 2016-03-18
Category: Creations
Summary: A dress made out of LEDs that twinkle like stars.
Short: 4
A friend of mine was attending a stars and constellations themed ball. She wanted to wear a dress that was lit up with LEDs acting as twinkling stars. Seven of the 28 stars are aligned to resemble the Big Dipper constellation and twinkle differently than the rest, which twinkle in a random pattern.
![[dress1.jpg | a girl wearing a blue dress with a number of LEDs shining through the fabric]]
## Construction
The LEDs came from that strip that was cut up and soldered together with very small wires. Each of the LEDs can be controlled individually.
![[dress2.jpg | the controller circuit board, and the string of soldered together LEDs]]
Twenty-one of the stars are light magenta in color and twinkle by fading randomly. The seven LEDs that form the Big Dipper continually scroll through a gradient of three colors. Instead of calculating the values of each color in the gradient as the program runs, a lookup table is used.
<video autoplay muted loop style="display:block; margin: 0 auto;">
<source src="{static}/media/dress3.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>

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Title: Remote Control Light Switch
Date: 2014-10-09
Category: Creations
Summary: A device to toggle my lights remotely.
Short: remote
I wanted the ability to toggle my bedroom light remotely for convenience. I designed a circuit that allows me to control my light with any device that can load a webpage.
I still wanted to be able to control the light manually, so I bought a metallic face-plate and turned it into a capacitive touch sensor. The slightest touch anywhere on the plate is enough to toggle the light. I had to electrically isolate the metal screws from it because they screw into a grounded switch box.
![[light1.jpg | my custom light switch, a Raspberry Pi computer, and an old iPhone]]
## Function
I have a Raspberry Pi ($35 computer) on my home network that runs a web server. When you connect to it in your web browser, a page loads with buttons to turn the light on or off. When you press a button, the server executes a command that sends a message over Bluetooth to the light switch. The Bluetooth module in the wall receives this message and forwards it to the microcontroller, which processes it and toggles the relay. The whole circuit is also powered from mains by an AC-DC converter.
This entire process happens quicker than half a second, so it feels instant.
![[light2.jpg | the front side which has several electrical components]]
<span class="aside">Black stuff's liquid electrical tape</span>
![[light3.jpg | the back side which has wires soldered to connect all the components]]

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Title: Choosing a Linux Flavour
Date: 2020-10-31
Category: Writing
Summary: A recommendation on which flavour of Linux to run.
Wide: true
Short: 6
[TOC]
People often ask me which flavour of Linux they should install. In summary, choose Ubuntu if it's your first time. Once you are comfortable, install Debian the next time you need to install Linux.
I run Debian on my computers and servers.
## Linux Distributions
<span class="aside">Interjection: it's technically called GNU/Linux</span>
When people refer to the "flavour of Linux" they are talking about a Linux distribution (distro). It mostly describes what software is distributed in its software repository.
"A typical Linux distribution comprises a Linux kernel, GNU tools and libraries, additional software, documentation, a window system, a window manager, and a desktop environment." [Wikipedia]
The major Linux distros are practically all the same. If you master one it's easy to pick up the others. The main differences you'll run into are which tools you use to install new software, and the desktop environment, which is what all the windows and buttons look like.
I recommend two Linux distros, Debian and Ubuntu. Ubuntu is based off of Debian, so they are very similar.
## Pros of Debian
Debian is one of the oldest distros and many other distros are based off it. You can see a timeline visualization of all its derivatives here:
<https://upload.wikimedia.org/wikipedia/commons/1/1b/Linux_Distribution_Timeline.svg>
This image is what originally convinced me to use Debian. Scroll down until you see it and zoom out so you grasp how many derivatives it has.
Debian is also non-commercial and requires that all software in its main repository is free and open source. This is important because that grants you the right to study, change, and distribute the software and source code to anyone and for any purpose. They also follow a strong social contract you can see here:
<https://www.debian.org/social_contract>
It's also a very stable Linux distro since they freeze all software features on each release. This makes it great for servers because nothing will break when it updates.
The main Raspberry Pi distro is nearly identical to Debian, so you'll also gain familiarity with it.
## Cons of Debian
Since Debian requires all its software to be free and open source, proprietary hardware drivers aren't included in its main repo. This can make installing Debian difficult if your hardware requires proprietary drivers. You'll need to use an installation image found here:
<https://cdimage.debian.org/cdimage/unofficial/non-free/cd-including-firmware/>
The fact that Debian freezes software features can also mean that your software gets old until the next Debian release. If you want versions that are bleeding edge, you'll need to use Debian Unstable as described here:
<https://wiki.debian.org/DebianUnstable#Installation>
Don't be fooled by the name "unstable". I use it for my personal computers and it runs fine.
## Pros of Ubuntu
Ubuntu is incredibly easy to install. You can also try it out before deciding to install it. The distro pretty much just works on what ever hardware you have.
It's very beginner friendly because it's so popular. Any problem you search for will reveal dozens of threads with people solving the same problem.
## Cons of Ubuntu
Unfortunately Ubuntu is developed by a commercial company, Canonical. The company's interests come first, before the users' and they have a track record of betraying their users' trust and privacy.
Years ago Ubuntu had a feature enabled by default that would send your desktop searches to Amazon so they could suggest products for you to buy:
<https://www.pcworld.com/article/2840401/ubuntus-unity-8-desktop-removes-the-amazon-search-spyware.html>
Currently whenever you remote login to your Ubuntu machine, it phones home to Canonical and they collect info about your system:
<https://ubuntu.com/legal/motd>
While these reasons are fairly minor, they are quite frowned upon in the Linux community and are reason enough to switch to Debian once you are comfortable with using Linux.
[Wikipedia]: https://en.wikipedia.org/wiki/Linux_distribution

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Title: Man's Reach Exceeds His Grasp
Date: 2012-04-11
Category: Creations
Summary: My first attempt at painting with acrylic.
Short: 7
The painting is called “Mans Reach Exceeds His Grasp”. I've always wanted to try painting and thought I had a good idea, so after a couple of drawings I attempted to paint it. I eventually got it framed at Michaels. Many thanks to my friend Laura for the opportunity to do this, I couldn't have done it without her help.
![[painting1.jpg | a painting of water pouring out of a vase and into a hand, then turning to sand]]
## The Meaning
Its hard to see in the photo, but the moment the water touches his hand it turns into sand and is taken by the slight breeze. The title is a quote from Andrea del Sarto, a poem by Robert Browning. It is also said by Nikola Teslas character in my favourite movie, [The Prestige](https://www.imdb.com/title/tt0482571/).
“I, painting from myself and to myself,
Know what I do, am unmoved by mens blame
Or their praise either. Somebody remarks
Morello's outline there is wrongly traced,
His hue mistaken; what of that? or else,
Rightly traced and well ordered; what of that?
Speak as they please, what does the mountain care?
Ah, but a mans reach should exceed his grasp,
Or whats a heaven for?”
Robert Browning from *Andrea del Sarto*
## Creation
I started with the background, trying to make it blurry and out of focus, then slowly progressed to the foreground. The hands were drawn in pencil and painted in. It was quite difficult to get the blending and shadows perfect, but I had Laura to tell me when things didn't look right. Below I am trying to figure out what a hand looks like in a mirror.
![[painting2.jpg | me looking at my own hand in the mirror as a guide]]

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Title: Automatic Plant Waterer
Date: 2014-06-05
Category: Creations
Summary: A device that automatically waters plants.
short: 8
One day I decided watering my one plant was too much work, so I automated it. It's also great for when I'm on vacation. The plant is a year old now and doesn't look as good as it used to (kinda like you). So this machine is like its life support.
<span class="aside">Update: this plant died long ago</span>
![[waterer1.jpg | the device and pump on a 2L pop bottle with a tube running to a flowerpot]]
## First Attempt
The design was very simple and soldered together on perf board. A microcontroller turns the pump on for 20 seconds, then waits 24 hours and restarts. The pump ran way too fast so it was slowed down to 10% power.
This design suffered from a fatal problem. After running, there was a chance that the tube would stay full of fluid. If the water level in the pop bottle was too high, it could siphon out. I woke up with a flower pot overflowing with water a couple of times.
![[waterer2.jpg | a new version feeding into a different plant]]
## Second Attempt
I liked the idea so much that I made a second iteration. This one used a custom printed circuit board with a lot more features. The pumping duration could be adjusted with a screwdriver. This was useful as the plant (now a [Ming aralia](https://en.wikipedia.org/wiki/Polyscias_fruticosa)) grew.
Another feature was the ability to run the pump backwards. This completely eliminated the siphoning problem from before. After pumping for a set duration, it would run backwards until the tube was cleared of water.
<span class="aside">Also dead :(</span>
![[waterer3.jpg | the new version beside a big Ming aralia plant with bushy drooping leaves and skinny stems]]

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Title: Solar Car
Date: 2013-04-27
Category: Creations
Summary: About my time volunteering with the University of Calgary Solar Car Team, where I designed a maximum power point tracker.
Short: 9
I joined the University of Calgary Solar Car Team in my first semester for a chance to learn things, gain practical experience, and meet people that share my interests. The car was the top Canadian team in a 3000 km race from Darwin to Adelaide, Australia in 2011. We met up at a shop on campus every Saturday morning to work on the new Generation IV of the solar car.
![[solar1.jpg | the MPPT device, a printed circuit board with bulky round electrical components held in my hand]]
## The Helianthus MPPT
I was in charge of designing and assembling the MPPTs (maximum power point trackers) for the new generation solar car. An MPPT extracts as much power out of the solar cells as possible. The solar array operates less efficiently without them. The Generation IV car, Schulich Delta (pictured below) uses seven of them: one per section of solar cells with similar lighting conditions. Andrei and I designed the MPPT above.
![[solar2.jpg | the solar car from an angle with a driver inside]]

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Title: Wine Crate Coffee Table
Date: 2018-09-12
Category: Creations
Summary: A coffee table made out of wooden wine creates.
Short: 0
My close friend Odai saw a simple coffee table design online that was built out of four wooden wine crates. They are quite cheap and available at any hardware store. We each wanted to make one so went and bought eight crates and some plywood to use as a base.
We went to my local makerspace, Protospace, to build them in the wood shop. We thought it would be a quick job only taking a few hours, but it turned out to be a twelve hour job over a couple of days. At least we were in good company!
![[wine1.jpg | the table before staining. four box-like wine crates are on their sides and joined together in a spiral. a messy wood shop is in the background]]
![[wine2.jpg | the two tables after staining. one face is centred and the contrast between the dark stain and light wood grain shows.]]
The wine crates were glued and then brad-nailed together. Extra wood was added under the thin top strips for support. After the glue dried, the brad nails were painstakingly removed because the ones we used were too long and stuck out.
After being attached to the base, the entire table was sanded and then stained. We let it dry overnight and returned the following day to add a quick layer of varnish.
![[wine3.jpg | the table in my living room with blankets inside the wine crates and a plant pot in the centre growing a bonsai tree and a succulent]]

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Disallow:

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Title: Hand of Ozymandias
Date: 2012-03-23
Category: Projects
Summary: A withered hand I welded out of scrap metal.
I was visiting my cousins in Radium, BC and decided to learn stick welding at
their shop. I wanted to create a sculpture, so with pieces of scrap metal I
welded together this hand. The beads are far from perfect. Working with small
pieces of rusted metal made it difficult.
![a rusted hand welded together out of scrap square stock metal tubing]({static}/images/hand-of-ozymandias/hand1.jpg)
## The Name
One of my favourite poems is [Ozymandias](https://en.wikipedia.org/wiki/Ozymandias)
by Percy Bysshe Shelley. It's about the inevitable complete decline of all
rulers and the empires they build, however mighty in their time. This is the
hand of Ozymandias sticking out from the sand, grasping for life after he has
been reduced to dust.
## Construction
I eyeballed the joint angles and my cousin cut them to spec with an angle
grinder. It was made in a machine shop with no real planning done ahead of time.
In between welds, I used my own hand as a reference. Below is a picture of me
adding a bead to it.
![me welding the hand causing a very bright white light that washes out the photo]({static}/images/hand-of-ozymandias/hand2.jpg)

View File

@@ -1,28 +0,0 @@
Title: LED Dress
Date: 2016-03-18
Category: Projects
Summary: A dress made out of LEDs that twinkle like stars.
A friend of mine was attending a stars and constellations themed ball. She
wanted to wear a dress that was lit up with LEDs acting as twinkling stars.
Seven of the 28 stars are aligned to resemble the Big Dipper constellation and
twinkle differently than the rest, which twinkle in a random pattern.
![a girl wearing a blue dress with a number of LEDs shining through the fabric]({static}/images/dress/dress1.jpg)
## Construction
The LEDs came from that strip that was cut up and soldered together with very
small wires. Each of the LEDs can be controlled individually.
![the controller circuit board, and the string of soldered together LEDs]({static}/images/dress/dress2.jpg)
21 of the stars are light magenta in color and twinkle by fading randomly. The
seven LEDs that form the Big Dipper continually scroll through a gradient of
three colors. Instead of calculating the values of each color in the gradient as
the program runs, a lookup table is used.
<video autoplay muted loop style="display:block; margin: 0 auto;">
<source src="{static}/videos/dress/dress3.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>

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@@ -1,33 +0,0 @@
Title: Remote Control Light Switch
Date: 2014-10-09
Category: Projects
Summary: A device to toggle my lights remotely.
I wanted the ability to toggle my bedroom light remotely for convenience. I
designed a circuit that allows me to control my light with any
device that can load a webpage.
I still wanted to be able to control the light manually, so I bought a metallic
face-plate and turned it into a capacitive touch sensor. The slightest touch
anywhere on the plate is enough to toggle the light. I had to electrically
isolate the metal screws from it because they screw into a grounded switch box.
![my custom light switch, a Raspberry Pi computer, and an old iPhone]({static}/images/light-switch/light1.jpg)
## Function
I have a Raspberry Pi ($35 computer) on my home network that runs a web server.
When you connect to it in your web browser, a page loads with buttons to turn
the light on or off. When you press a button, the server executes a command that
sends a message over Bluetooth to the light switch. The Bluetooth module in the
wall receives this message and forwards it to the microcontroller, which
processes it and toggles the relay. The whole circuit is also powered from mains
by an AC-DC converter.
This entire process happens quicker than half a second, so it feels instant.
![the front side which has several electrical components]({static}/images/light-switch/light2.jpg)
<span class="aside">Black stuff's liquid electrical tape</span>
![the back side which has wires soldered to connect all the components]({static}/images/light-switch/light3.jpg)

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Title: Choosing a Linux Flavour
Date: 2020-10-31
Category: Writing
Summary: A recommendation on which flavour of Linux to run.
Wide: true
[TOC]
People often ask me which flavour of Linux they should install. In summary,
choose Ubuntu if it's your first time. Once you are comfortable, install Debian
the next time you need to install Linux.
I run Debian on my computers and servers.
## Linux Distributions
When people refer to the "flavour of Linux" they are talking about a Linux
<span class="aside">Interjection: it's technically called GNU/Linux</span>
distribution (distro). It mostly describes what software is distributed in its
software repository.
"A typical Linux distribution comprises a Linux kernel, GNU tools and
libraries, additional software, documentation, a window system, a window
manager, and a desktop environment." [Wikipedia]
The major Linux distros are practically all the same. If you master one it's
easy to pick up the others. The main differences you'll run into are which
tools you use to install new software, and the desktop environment, which is
what all the windows and buttons look like.
I recommend two Linux distros, Debian and Ubuntu. Ubuntu is based off of
Debian, so they are very similar.
## Pros of Debian
Debian is one of the oldest distros and many other distros are based off it.
You can see a timeline visualization of all its derivatives here:
<https://upload.wikimedia.org/wikipedia/commons/1/1b/Linux_Distribution_Timeline.svg>
This image is what originally convinced me to use Debian. Scroll down until you
see it and zoom out so you grasp how many derivatives it has.
Debian is also non-commercial and requires that all software in its main
repository is free and open source. This is important because that grants you
the right to study, change, and distribute the software and source code to
anyone and for any purpose. They also follow a strong social contract you can
see here:
<https://www.debian.org/social_contract>
It's also a very stable Linux distro since they freeze all software features on
each release. This makes it great for servers because nothing will break when
it updates.
The main Raspberry Pi distro is nearly identical to Debian, so you'll also gain
familiarity with it.
## Cons of Debian
Since Debian requires all its software to be free and open source, proprietary
hardware drivers aren't included in its main repo. This can make installing
Debian difficult if your hardware requires non-free drivers. You'll need to use
a non-free installation image found here:
<https://cdimage.debian.org/cdimage/unofficial/non-free/cd-including-firmware/>
The fact that Debian freezes software features can also mean that your software
gets old until the next Debian release. If you want versions that are bleeding
edge, you'll need to use Debian Unstable as described here:
<https://wiki.debian.org/DebianUnstable#Installation>
Don't be fooled by the name "unstable". I use it for my personal computers and
it runs fine.
## Pros of Ubuntu
Ubuntu is incredibly easy to install. You can also try it out before deciding
to install it. The distro pretty much just works on what ever hardware you
have.
It's very beginner friendly because it's so popular. Any problem you search for
will reveal dozens of threads with people solving the same problem.
## Cons of Ubuntu
Unfortunately Ubuntu is developed by a commercial company, Canonical. The
company's interests come first, before the users' and they have a track record
of betraying their users' trust and privacy.
Years ago Ubuntu had a feature enabled by default that would send your desktop
searches to Amazon so they could suggest products for you to buy:
<https://www.pcworld.com/article/2840401/ubuntus-unity-8-desktop-removes-the-amazon-search-spyware.html>
Currently whenever you remote login to your Ubuntu machine, it phones home to
Canonical and they collect info about your system:
<https://ubuntu.com/legal/motd>
While these reasons are fairly minor, they are quite frowned upon in the Linux
community and are reason enough to switch to Debian once you are comfortable
with using Linux.
[Wikipedia]: https://en.wikipedia.org/wiki/Linux_distribution

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Title: Creations
Template: creations
Slug: z
Qot.

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Title: Projects
Template: projects
Slug: y
Qot.

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Title: Writing
Template: writing
Slug: x
Qot.

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Title: Mans Reach Exceeds His Grasp
Date: 2012-04-11
Category: Projects
Summary: My first attempt at painting with acrylic.
The painting is called “Mans Reach Exceeds His Grasp”. I've always wanted to
try painting and thought I had a good idea, so after a couple of drawings I
attempted to paint it. I eventually got it framed at Michaels. Many thanks to my
friend Laura for the opportunity to do this, I couldn't have done it without her
help.
![a painting of water pouring out of a vase and into a hand, then turning to sand]({static}/images/painting/painting1.jpg)
## The Meaning
Its hard to see in the photo, but the moment the water touches his hand it
turns into sand and is taken by the slight breeze. The title is a quote from
Andrea del Sarto, a poem by Robert Browning. It is also said by Nikola Teslas
character in my favourite movie, [The Prestige](https://www.imdb.com/title/tt0482571/).
“I, painting from myself and to myself,
Know what I do, am unmoved by mens blame
Or their praise either. Somebody remarks
Morello's outline there is wrongly traced,
His hue mistaken; what of that? or else,
Rightly traced and well ordered; what of that?
Speak as they please, what does the mountain care?
Ah, but a mans reach should exceed his grasp,
Or whats a heaven for?”
Robert Browning from *Andrea del Sarto*
## Creation
I started with the background, trying to make it blurry and out of focus, then
slowly progressed to the foreground. The hands were drawn in pencil and painted
in. It was quite difficult to get the blending and shadows perfect, but I had
Laura to tell me when things didn't look right. Below I am trying to figure out
what a hand looks like in a mirror.
![me looking at my own hand in the mirror as a guide]({static}/images/painting/painting2.jpg)

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Title: Automatic Plant Waterer
Date: 2014-06-05
Category: Projects
Summary: A device that automatically waters plants.
One day I decided watering my one plant was too much work, so I automated it.
It's also great for when I'm on vacation. The plant is a year old now and
doesn't look as good as it used to (kinda like you). So this machine is like its
life support.
<span class="aside">Update: this plant died long ago</span>
![the device and pump on a 2L pop bottle with a tube running to a flowerpot]({static}/images/plant-waterer/waterer1.jpg)
## First Attempt
The design was very simple and soldered together on perf board. A
microcontroller turns the pump on for 20 seconds, then waits 24 hours and
restarts. The pump ran way too fast so it was slowed down to 10% power.
This design suffered from a fatal problem. After running, there was a chance
that the tube would stay full of fluid. If the water level in the pop bottle was
too high, it could siphon out. I woke up with a flower pot overflowing with
water a couple of times.
![a new version feeding into a different plant]({static}/images/plant-waterer/waterer2.jpg)
## Second Attempt
I liked the idea so much that I made a second iteration. This one used a custom
printed circuit board with a lot more features. The pumping duration could be
adjusted with a screwdriver. This was useful as the plant (now a
[Ming aralia](https://en.wikipedia.org/wiki/Polyscias_fruticosa)) grew.
Another feature was the ability to run the pump backwards. This completely
eliminated the siphoning problem from before. After pumping for a set duration,
it would run backwards until the tube was cleared of water.
<span class="aside">Also dead :(</span>
![the new version beside a big Ming aralia plant with bushy drooping leaves and skinny stems]({static}/images/plant-waterer/waterer3.jpg)

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Title: Solar Car
Date: 2013-04-27
Category: Projects
Summary: About my time volunteering with the University of Calgary Solar Car Team, where I designed a maximum power point tracker.
I joined the University of Calgary Solar Car Team in my first semester for a
chance to learn things, gain practical experience, and meet people that share my
interests. The car was the top Canadian team in a 3000 km race from Darwin to
Adelaide, Australia in 2011. We met up at a shop on campus every Saturday
morning to work on the new Generation IV of the solar car.
![the MPPT device, a printed circuit board with bulky round electrical components held in my hand]({static}/images/solar-car/solar1.jpg)
## The Helianthus MPPT
I was in charge of designing and assembling the MPPTs (maximum power point
trackers) for the new generation solar car. An MPPT extracts as much power out
of the solar cells as possible. The solar array operates less efficiently
without them. The Generation IV car, Schulich Delta (pictured below) uses seven
of them: one per section of solar cells with similar lighting conditions. Andrei
and I designed the MPPT above.
![the solar car from an angle with a driver inside]({static}/images/solar-car/solar2.jpg)

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aka pollution, dust
Study linking air pollution to mental disorders:
https://www.kcl.ac.uk/news/study-supports-link-between-traffic-related-air-pollution-and-mental-disorders
Calgary air quality:
https://www.cbc.ca/news/canada/calgary/calgary-air-quality-map-ranking-1.4547149
Woodgears (Matthias Wandel) page on dust:
https://woodgears.ca/dust/dylos.html
https://woodgears.ca/dust_collector/index.html
Study of low-cost sensor accuracy:
https://www.hindawi.com/journals/js/2018/5096540/
Experiments on DIY air purifier:
https://news.t0.vc/QZKP
https://dyno-might.github.io/2020/12/15/some-real-data-on-a-DIY-box-fan-air-purifier/
Sensors
=======
Fancy serial one with inlet:
- SDS011
- $17 USD
https://www.aliexpress.com/item/32606349048.html
One Farzad gave me:
- DSM501A
- $4 USD
https://www.aliexpress.com/item/1005001710572424.html
Fancy commercial one:
- DC1100 PRO
- $289 USD
Professional fluke:
- Fluke 985
- $7000 CAD
Good digikey one:
- https://www.digikey.ca/en/products/detail/honeywell-sensing-and-productivity-solutions/HPMA115S0-XXX/7202204
- connector? https://www.digikey.ca/en/products/detail/molex/0151340803/6198165 --- NO
- cable per sensor:
- 4 x 900-2149211112-ND (pre-crimped lead)
- 1 x WM1726-ND (connector housing)

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aka hacking apk reverse engineering
Guides:
https://blog.securityevaluators.com/how-to-view-tls-traffic-in-androids-logs-6a42ca7a6e55
https://archive.ph/zDaV6
- used during Lutron hacking
Tools:
$ sudo apt install adb apktool openjdk-11-jdk-headless zipalign apksigner
$ locate apktool
- replace apktool with new version:
- https://github.com/iBotPeaches/Apktool/releases
$ sudo mv /usr/share/apktool/apktool.jar /usr/share/apktool/apktool.jar.orig
$ sudo mv ~/Downloads/apktool_2.5.0.jar /usr/share/apktool/apktool.jar
Get APK file:
- find name of the app
$ adb shell pm list packages | grep covid
- find path of the app
$ adb shell pm path ca.ab.gov.covidrecordsverifier
- pull the apk
$ adb pull [path] .
Decompile:
$ apktool d application.apk -o output/
Compile:
$ apktool b output/ --use-aapt2 -o patched.apk
$ zipalign 4 patched.apk patched2.apk
Sign:
- disable verification over USB in developer settings?
- the following just once:
$ keytool -genkey -v -keystore release.keystore -alias alias_name -keyalg RSA -keysize 2048 -validity 10000
$ apksigner sign --ks release.keystore patched2.apk
Install:
$ adb install patched2.apk
Read logs:
$ adb logcat -c
Old instructions
----------------
$ jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore release.keystore patched.apk alias_name

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Slowing Aging
=============
- Avoid DNA damage (wear sunscreen)
- Eat less - caloric restriction
- Eat less protein
- Do exercise (HIIT)
- Be cold
- Be hot
... these trigger longevity genes to trick body into preserving genome
Reversing aging
===============
Theory
------
- Shinya Yamanaka discovered 4 factors that reset epigenome of cell back to pluriportent stem cell
- Myc, Oct3/4, Sox2 and Klf4
- dont do it all, would turn into tumor
- suggests there are ways to revert cells and reverse ageing
- David Sinclar's lab reversed aging in old mice so they could see like they were young again
- used 3/4 of the reprogramming factors, not Myc as causes cancer
- can turn system on and off to limit reversal
Resources
=========
- Veratasium How to Slow Aging:
https://www.youtube.com/watch?v=QRt7LjqJ45k
- JRE David Sinclair #1:
https://www.youtube.com/watch?v=HOTS0HS7aq4
Notes:
Calorie restriction, mostly vegetarian diet, avoid sugar and carbs.
On weekends, he exercises at the gym and then sits in a hot sauna before plunging himself into an ice-cold pool, as well as tracks his biomarkers regularly.
Takes vitamin D, vitamin K2, and aspirin.
Takes each morning: resveratrol, NMN, and metformin
- JRE David Sinclair #2:
https://www.youtube.com/watch?v=ZGLL77wYxe8
0:00 The new book, resveratrol
7:00 NMN and NAD+, metformin and exercise
18:00 Sinclairs family went on a safari
48:30 back to the anti-aging book, longevity
52:20 Sinclairs healthy 80 year old father: “Hes fitter than me”, his rebel grandmother
1:10:00 intermittent fasting
1:15:50 I.V. NAD+
1:18:00 nutrition, yogurt and other food
1:32:00 resveratrol, colorful foods
1:41:00 sleep
1:45:40 what should people be doing? (Sinclair is wrong about airport scanners)
1:48:25 NMN and NR online
1:50:25 CRISPR/ genetic engineering
2:08:00 blood rejuvenation
2:12:50 what is on the horizon? senescence cells, “Weve learned how to fly…”
- Age reduction breakthrough:
https://joshmitteldorf.scienceblog.com/2020/05/11/age-reduction-breakthrough/
- Yamanaka paper:
https://www.cell.com/fulltext/S0092-8674(06)00976-7

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UI / UX
=======
Principals:
https://news.t0.vc/EKUD/c#punnerud1596400621
Little details:
https://littlebigdetails.com/
Choosing a colour palette:
https://refactoringui.com/previews/building-your-color-palette/
What not to do:
https://annoying.technology/
https://grumpy.website/
Web Design / Inspo
==================
https://breakermag.com/trapped-at-sea-with-cryptos-nouveau-riche/
- Good mobile site, very clean and just works
https://www.maxhallinan.com/posts/2018/12/07/little-languages/
- Good, simple blog. Lacks an image-first menu though.
https://taimur.me/posts/notes-from-malcolm-gladwell-s-writing-masterclass-part-1
- Another left-aligned simple blog
http://haya2now.jp/en.html
- Cool dashboard UI for japanese space probe
https://wiki.xxiivv.com/#devine+lu+linvega
- Devine Lu Linvega: Some portfolio of a designer that makes and uses lots of tools and systems
https://maki.cat
- css / html god that's into japanese culture and cute things
https://www.thecut.com/2019/05/how-scammers-trick-people-into-thinking-theyre-wealthy.html
- very sexy clean cut news website
https://techcrunch.com/2019/05/06/windows-gets-a-new-terminal/
- clean blog post
https://wattenberger.com/
- she does lots of stuff
https://devonzuegel.github.io/
- also does lots of stuff, cool projects, notes
http://nolannicholson.com/index.html
- dead simple portfolio website. perfect, maybe just add images
- this might have changed?
https://vim.reversed.top/
- card like interface
https://simplenote.com/
- great product website
https://www.gwern.net/index
- latex looking site, guy does a lot of stuff
https://caro.io/
- good folio site with squares like what I wanted
https://markosaric.com/
- marketing guy that has a nice dark mode theme
- this guy tricked me into reading an ad: https://news.t0.vc/VBHA blew up on HN
https://anders.unix.se/
- very clean readable website
https://schollz.com
- also simple website with projects and blog. guy does a lot, very inspiring
https://www.unwoke.hr
- great design for job board
https://ciechanow.ski/archives/
- very informative blog with clean demos
https://mazaj.ca
- odai's friend arabic coffee website
- beautiful design, graphics, and business plan
https://www.brandur.org/articles
- sexy clean articles
https://secret.club/2021/05/13/source-engine-rce-join.html
- great blog design
https://www.munichre.com
- nice official business looking site
Motherfucking websites:
https://motherfuckingwebsite.com/
http://bettermotherfuckingwebsite.com/
https://perfectmotherfuckingwebsite.com/
https://thebestmotherfucking.website/
https://bestmotherfucking.website/
https://evenbettermotherfucking.website/
https://inconvergent.net/
https://img.inconvergent.net/generative/78b7266.html
- cool artist's minimalistic site
Crazy websites:
- https://news.t0.vc/EYHQ (list)
- https://www.kickscondor.com/
- https://yvettesbridalformal.p1r8.net/
Colors:
Nice colors:
- #83a8f3 (close to cornflower blue)
Fonts
=====
Baskerville:
https://fonts.google.com/specimen/Libre+Baskerville#pairings
- NYT study said it was best?

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aka Signal Conditioning, software defined radio, gnu radio, rtl-sdr
Good intro:
http://pyageng.mpastell.com/book/dsp.html
http://pyageng.mpastell.com/book/sampling.html#cid7
Textbook list:
https://dspguru.com/dsp/books/favorites/
DSP Guide:
http://www.dspguide.com/
GNU Radio cookbook:
https://cdn.hackaday.io/files/1648847054397056/GRC%20Cook%20Book.pdf
SDR assignments:
https://greatscottgadgets.com/sdr/

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Datasheet:
https://www.espressif.com/sites/default/files/documentation/0a-esp8266ex_datasheet_en.pdf
Tech Reference:
https://www.espressif.com/sites/default/files/documentation/esp8266-technical_reference_en.pdf
PCB Design Guidelines:
https://www.espressif.com/sites/default/files/documentation/esp8266_hardware_design_guidelines_en.pdf
Pins
====
Multiplexing analog input:
https://internetofhomethings.com/homethings/?p=530
Digital:
- has hysterisis
- Vil = 0.25 * Vin
- Vih = 0.75 * Vin
ADC:
- only 1 analog pin, A0
- 10 bits, 0-1023
- only supports 0.2 - 1.2 V, unless there's on-board voltage divider
WeMos D1 Mini
=============
- has on board 3V3 ADC divider

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Enter today's date in ISO format:
$ date -I
To include seconds:
$ date -Is
Ping scan subnet (find a Raspberry Pi):
$ nmap -sn 192.168.0.0/24
Port 22 scan subnet:
$ nmap -sS -p 22 192.168.10.0/24
- run as root to get device names
To SCP with spaces in path, escape the spaces and surround the whole arg with quotes.
Serial Terminal:
Minicom /dev/ttyACM0 115200 8N1 w/ Hardware flow control: yes works.
If not, send Break (ctrl-a F).
To enable on server side (systemd):
$ systemctl enable serial-getty@ttyS0.service
$ systemctl start serial-getty@ttyS0.service
How to list wifi networks:
$ sudo iw dev wlp58s0 scan
Show top 10 edited files in git repo:
$ git log --pretty=format: --name-only | sort | uniq -c | sort -rg | head -10
Recursively hash directory, then hash result:
$ md5deep -rl . | sort | md5sum
Redirect stderr to stdout and pipe: |&
Redirect stderr to stdout: 2>&1 (do it after)
Copy torrent but use hardlinks instead:
$ cp -al source dest
Byobu tmux toggle function keys:
Shift + F12
- do this if Alt+Arrow is letters
Get rid of extra byobu sessions:
$ tmux ls | grep ^_ | cut -f1 "-d:" | xargs -t -L1 -r tmux kill-session -t
Make a PDF look scanned:
$ convert "$1" -alpha Off -density 150 -colorspace gray -blur 0.5x0.5 -rotate 0.4 -level 40%,60% "scanned-$1"
Insert last arg: alt+.
Insert 2nd last arg: alt+_ alt+.
Insert 3rd last arg: alt+_ 2 alt+.
SSH reverse tunnel router admin:
$ ssh -L 2222:192.168.0.1:80 user@10.9.0.3
- open localhost:2222 in browser
Select a display over ssh:
$ export DISPLAY=:1
Spawn new shell with group assignments:
$ exec su -l $USER
xargs:
- converts stdin to arguments for commands that dont accept stdin
- used with echo, compacts a list to one line
- see each command xargs runs: --verbose
- dont run if stdin is empty: -r
- run command once per line: -L1
- convert stdin to argument:
$ echo 'foo' | xargs mkdir
- convert list to one line:
$ cat foo.txt | xargs echo
- run a command for each line:
$ cat foo.txt | xargs -L0 --verbose echo
Systemd
=======
Journalctl
----------
Examples:
$ journalctl --utc
$ journalctl -b # display logs since boot
$ journalctl --since "2015-01-10" --until "2015-01-11 03:00"
$ journalctl --since 09:00 --until "1 hour ago"
$ journalctl -u nginx.service -u php-fpm.service --since today
Bash scripting
==============
Always quote variables when you use them.
Run set -eu to crash when on errors and when using unset variables.
Use basedir to just get filename.
Gpg sign, encrypt, and armour:
gpg -sear [NAME]
Get window's handle with xdotool:
xdotool search --name "Google Play"
Get window's position and size with xdotool:
xdotool getwindowgeometry 44047673
Subtract 10 from the Y position, and 82 from the Y
Keyboard Shortcuts
==================
Focus Keepass, Super+Z: bash /home/tanner/scripts/focuskeepass.sh
Arrange Desktop, Super+X: /home/tanner/scripts/arrangedesktop.sh
Home Controller: Super+C: /home/tanner/scripts/homecontroller.sh
Toggle light 0, Super+1: /home/tanner/scripts/homecontroller.sh 0
Open terminal, Super+T: xfce4-terminal
Rofi, Super+`: rofi -combi-modi window,run -show combi -normal-window
** set "switch windows" to alt-tab to make it normal
Make right alt normal:
- tweak tool > keyboard & mouse > Additional Layout Options button
- expand "Key to choose 3rd level"
- deselect Right Alt
Nginx
=====
Log rotate /etc/logrotate.d/nginx:
size 100M
missingok
rotate 20
compress
delaycompress
notifempty
create 0640 www-data adm
Logging /etc/nginx/nginx.conf:
# Make sure to copy the GeoIP files!
geoip_country /usr/share/GeoIP/GeoIP.dat;
geoip_city /usr/share/GeoIP/GeoIPCity.dat;
log_format tannersformat '[$time_iso8601] $remote_addr ($geoip_city, $geoip_country_code) $request_method "$server_name$request_uri" $status "$http_referer" "$http_user_agent"';
access_log /var/log/nginx/access.log tannersformat;
error_log /var/log/nginx/error.log;
$ wget https://t0.vc/f/GeoIPCity.dat
$ sudo mv GeoIPCity.dat /usr/share/GeoIP/GeoIPCity.dat
OpenVPN
=======
Setup:
$ sudo su root
- follow steps here:
- https://wiki.debian.org/OpenVPN#TLS-enabled_VPN
- skip editing vars
- add random data to /etc/openvpn/easy-rsa/pki/.rnd to get rid of error messages
- use the # ./easyrsa [command] methods
- encrypt CA with password
- build the optional intermediate CA
- https://wiki.debian.org/OpenVPN#Static-Key_VPN
- improves security
- set auth SHA256
- save config file to /etc/openvpn/server.conf
- * set root's shell back to /bin/false *
Static IP:
- create a client (ie. "mediaserver") with easyrsa
$ mkdir /etc/openvpn/ccd
- edit /etc/openvpn/ccd/mediaserver:
ifconfig-push 10.8.0.100 255.255.255.0
- edit /etc/openvpn/server.conf:
client-config-dir /etc/openvpn/ccd
Routing / port forward:
- edit /etc/sysctl.conf:
net.ipv4.ip_forward=1
- edit /etc/default/ufw:
DEFAULT_FORWARD_POLICY="ACCEPT"
- edit /etc/ufw/before.rules at the top:
*nat
:POSTROUTING ACCEPT [0:0]
# ssh port forwarding
-A PREROUTING -d 159.203.223.101 -p tcp --dport 43655 -j DNAT --to-dest 10.8.0.100:43655
-A POSTROUTING -d 10.8.0.100 -p tcp --dport 43655 -j SNAT --to-source 10.8.0.1
# Allow traffic from OpenVPN client to eth0
-A POSTROUTING -s 10.8.0.0/8 -o eth0 -j MASQUERADE
COMMIT
$ sudo ufw disable && sudo ufw enable
$ sudo sysctl net.ipv4.ip_forward=1
- source: https://gist.github.com/kimus/9315140
Systemd fix:
- ensure config file is at /etc/openvpn/server.conf
$ sudo systemctl start openvpn@server
$ sudo systemctl enable openvpn@client
$ sudo systemctl daemon-reload
$ sudo service openvpn restart
- verify stop / start with ps aux | grep openvpn
- do same for "client"
- source: https://ubuntu.com/server/docs/service-openvpn
Systemd client:
$ sudo mv vpn2-client.ovpn /etc/openvpn/client.conf
$ sudo chown root:root /etc/openvpn/client.conf
$ sudo chmod 600 /etc/openvpn/client.conf
- if there's a password:
$ sudo -E vim /etc/openvpn/auth.txt
$ sudo chmod 600 /etc/openvpn/auth.txt
- add password to file
- add "askpass /etc/openvpn/auth.txt" to config file
- set up systemd:
$ sudo systemctl start openvpn@client
$ sudo systemctl enable openvpn@client
$ sudo systemctl daemon-reload
$ sudo service openvpn restart
Disable routing traffic over VPN:
- remove all "redirect-gateway" lines in client config
Gnome client:
- vpn settings, add
- import from file, select vpn2-client.ovpn
- add missing private key from /home/tanner/.cert/nm-openvpn/
- add password gush-tilt-shine-chute-pace-gecko
New Desktop
-----------
$ sudo apt install git tree htop byobu unattended-upgrades curl axel man-db vim vim-gtk netcat xfce4-terminal firefox chromium keepassxc mpv network-manager-openvpn-gnome bash-completion xdotool mlocate ncdu
$ sudo apt remove firefox-esr
- set up home directory...
Firefox extentions:
- Cookie AutoDelete
- Decentraleyes
- HTTPS Everywhere
- I dont care about cookies
- New Tab Override
- NoScript
- Privacy Badger
- SponsorBlock
- uBlock Origin
Fix popping after audio stops (disable audio power save):
$ sudo bash -c 'echo 0 > /sys/module/snd_hda_intel/parameters/power_save'
- to persist append to /etc/modprobe.d/audio_disable_powersave.conf:
options snd_hda_intel power_save=0

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Notes from Andy
---------------
Mastering your mind:
- can you control yourself?
- can you sit still physically?
- can you control your mind?
- can you concentrate on a simple object and nothing else?
- can you have no thoughts?
- can you free your mind from remembering the past or future?
- can you have no visual images / sounds?
- can you stop your inner monologue?
How to meditate:
- these steps are very gradual, not distinct steps:
- master focusing in the present (1-2 years)
- disregard the past and future
- focus on noises in the present. can jump around or listen to all.
- on failure gently pull back to the present
- mastery when you can do this for an hour
- can start with shorter sessions
- master focusing only a single element in the present
- for example, your breath
- master stopping the monologue
- stop talking to yourself
- stop making comments
- stop the chatter
- master total absorption into that single element
- deeper focus into the element
- Samadhi state
- can only experience your own, dont read the wiki
- Andy reached this only once, he felt omnipotent
- this becomes an intrinsic skill like talking and walking rather than a motor skill like throwing?
- if you dont use it you lose it?
- one you reach Samadhi your mind always meditates
Naval theory:
https://twitter.com/naval/status/1261481222359801856

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aka notetaking
Solutions
=========
Desires
-------
- Open source
- End to end encryption
- Portable data store - md (or exportable)
- Images
- Rich text editor WYSIWYG
- Linking notes together
- to whole note or header in note
- Sync
- Mobile support
- Folders
- Undo / versioning
Reviews
-------
Joplin:
- UI is very fast
- has its own sync server now, wait to mature?
- scroll in render view glitchy / laggy when zoomed
- WYSIWYG editor breaks some markdown
- clicking links in WYSIWYG requires ctrl
- can't see note names in notebook tree, so will be hard to find
- maybe that's better?
- mobile app lacks WYSIWYG
- mobile app md editor scroll shitty
- slow to edit notes in mobile app
- white flashes on dark mode desktop theme when switching notebooks
- Todo feature is cool. can make each note a todo and use the body to add context / info
- easy to rearrange todos
Obsidian:
- highly reviewed, looks sexy but needs more contrast
- no WYSIWYG editor yet - planned
- has graph and backlinks
- not open source
- files stored as plain text
Wiki.js:
- Supports LaTeX
- Support Markdown (it also supports formats such as html)
- Works in-browser (and therefore can be accessed on any device)
- Editing is easy (although this sounds like a "duh" feature, many self-hosted note apps are more like static site generators)
- Uploading files is simple
- Has multiple backup options (I use GitHub and .gitignore the textbooks)
Boostnote:
- no mobile support
Trilium:
- great encryption
- poor mobile support, Dom uses telegram as a buffer
- fully tried it, mobile is just too broken
- doesnt scroll all the way to the bottom of folders and note contents
- lots of other minor bugs
- parts of UI not updating like archived notes
- randomly refreshes the page
- header sizes all look the same
- today note button is slow to load
Simplenote:
- not self-hosted
- no folders
Turtl:
- buggy app
- bad organization system
Org-mode
- needs emacs
Taskwarrior:
- command line only
Zim:
- no built in sync
- no mobile
TiddlyWiki
- no built in sync
- one html file
- modern browsers block some file features?
https://collectednotes.com/
- no android
- watch them
https://github.com/athensresearch/athens
- not finished, keep an eye on
- ugly theme
Outline:
- https://www.getoutline.com/
Zenkit: proprietary
OneNote: proprietary
Google Keep: proprietary
Synapbook: proprietary
Workflowy: proprietary
Notion: proprietary, UX issues: https://news.t0.vc/DCGM
Roam Research: proprietary, cool graph feature though
RemNote: proprietary, spaced repetition
https://contexted.io/
https://rwtxt.com
Stuff to read:
https://news.t0.vc/YUAT/c
https://news.t0.vc/WLJJ/c
https://news.t0.vc/ORXL/c
https://old.reddit.com/r/CGPGrey/comments/ihkqjp/cortex_105_atomic_notes/
The perfect note-taking app:
https://www.youtube.com/watch?v=wpcVQeF07G4
- goes over the three types of note-takers
- librarian: likes to catalogue, usually write-only -> evernote
- gardener: likes connecting ideas in their own way -> roam
- architect: likes designing processes and structure -> notion
Formatting / Template
=====================
Unformatted info can just be sentences, paragraphs, or points.
Section
=======
Place two empty lines before the section header, empty line after
Subsection
-----------
Sub-subsection:
No linebreak for text within a section
Generic lists or steps:
- dash then a space
- lower case for prose
- Data points: gets capital
- like this
- sublists
- two spaces, dash, space
Todo lists:
o unfinished task
v finished task (looks like check mark)
x cancelled task
- I wonder if I should just use markdown?
* notes to consider
$ commands to run

39
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@@ -0,0 +1,39 @@
Development Setup:
$ sudo apt install python3 python3-pip python-virtualenv python3-virtualenv
$ virtualenv -p python3 env
$ . env/bin/activate
$ pip install -r requirements.txt
Django clone setup:
$ python manage.py makemigrations
$ python manage.py migrate
$ python manage.py createsuperuser
$ DEBUG=true python manage.py runserver 0.0.0.0:8000
Logging:
use logger.exception
Machine learning:
comma.ai switched to pyTorch
How to make a package:
https://news.t0.vc/ZBPS
Timezones
=========
NEVER USE .replace(tzinfo= EXCEPT FOR WITH UTC!
Assigning timezone to parsed string:
- example, you get a text timestamp and parse it with strptime
- solution:
t = datetime.strptime(timestamp, '%Y-%m-%d %H:%M:%S')
tz = pytz.timezone('America/Edmonton')
result = tz.localize(t)

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@@ -0,0 +1,70 @@
Barcelona:
- very touristy
Tarragona:
- 20 minutes south of Barcelona
- much cheaper and more historical
- Roman ruins are still there
- very close to the ocean
- lots of walking
- Tim stayed at Olivia hotel
- 100 m from Mediterranian
- right on the giant town plaza
- Amphithéâtre, Aqueducts, walls
Cervera:
- 25200 Lleida
- Tim's wife taught
- zero english
- train goes from Barcelona
- crazy festivals every ten days:
https://www.youtube.com/watch?v=kr03rCwa9ms
Malaga:
- city with the most soul
- nice beaches
- poorer
Granada:
- **alhambra: palace of the largest islamic empire, book ahead
- alkazah
*Alhambra:
- 'Remember to be punctual to access the Nasrid Palaces at the time selected on your ticket. The rest of the monument can be visited from 8:30 a.m. to 6:00 p.m. winter; 8:30 a.m. to 8:00 p.m. summer.'
- random document number 10L-ID10T
- Booking Reference Number: H0DIOBJ
Valencia:
- good flee market
Seville:
- odai's friend owns restaurant
- alcazar
- plaza de espana
- opera?
- Diego Velázquez birthplace?
Portugal
========
Lagos:
- Brassao restaurant very good
- sunset
Lisbon:
- a bit dirty
- have low expectations
Sintra:
- look like disney
- actual castle
- 45 min train from Lisbon
Porto:
- beautiful
- odai like better than lisbon
- on a cliffside
- where harry potter started

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@@ -0,0 +1,34 @@
Enter word under cursor into cmdline:
CTRL-R CTRL-W
(:help c_CTRL-R)
Rewrap text (reformat):
gq
Remove duplicates from file:
vim ~/.ssh/authorized_keys +":sort u|wq"
N ctrl-^ goes to buffer N
Centre current line on screen:
zz
Newrw:
- fixed on left: :20Lexplore
- change to tree: i
- toggle .hidden files: gh
Config
======
Start Vim without reading .vimrc:
vim -u NONE
Minimal sane config:
set encoding=utf-8
set nocompatible
set background=dark
set hidden

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@@ -34,7 +34,11 @@ MARKDOWN = {
'output_format': 'html5',
}
STATIC_PATHS = ['images', 'extra']
PLUGINS = [
'obsidian',
]
STATIC_PATHS = ['media', 'extra']
EXTRA_PATH_METADATA = {
'extra/favicon.svg': {'path': 'favicon.svg'},

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@@ -0,0 +1,69 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*- #
from __future__ import unicode_literals
import os
AUTHOR = 'Tanner Collin'
SITENAME = 'Tanner Collin'
SITEURL = ''
PATH = 'content'
TIMEZONE = 'Canada/Mountain'
DEFAULT_LANG = 'en'
# Feed generation is usually not desired when developing
FEED_ALL_ATOM = None
CATEGORY_FEED_ATOM = None
TRANSLATION_FEED_ATOM = None
AUTHOR_FEED_ATOM = None
AUTHOR_FEED_RSS = None
DEFAULT_PAGINATION = False
MARKDOWN = {
'extension_configs': {
'markdown.extensions.codehilite': {'css_class': 'highlight'},
'markdown.extensions.extra': {},
'markdown.extensions.meta': {},
'markdown.extensions.toc': {
'toc_depth': '2-3',
'anchorlink': True,
},
},
'output_format': 'html5',
}
STATIC_PATHS = ['images', 'extra']
EXTRA_PATH_METADATA = {
#'extra/favicon.svg': {'path': 'favicon.svg'},
}
# Uncomment following line if you want document-relative URLs when developing
#RELATIVE_URLS = True
THEME = 'themes/lite'
# turn off useless outputs
TAG_SAVE_AS = ''
CATEGORY_SAVE_AS = ''
AUTHOR_SAVE_AS = ''
ARCHIVES_SAVE_AS = ''
AUTHORS_SAVE_AS = ''
CATEGORIES_SAVE_AS = ''
TAGS_SAVE_AS = ''
INDEX_SAVE_AS = 'index.html'
ARTICLE_URL = '{short}'
ARTICLE_SAVE_AS = '{short}/index.html'
PAGE_URL = '{slug}'
PAGE_SAVE_AS = '{slug}/index.html'
def list_text_files():
return sorted(os.listdir('./content/text'))
JINJA_GLOBALS = {'list_text_files': list_text_files}
PROD = False

17
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@@ -0,0 +1,17 @@
<style>
body {background: #eee; font: 1.1rem/1.5 serif;}
h1, h2 {margin-left: -24; font-family: sans-serif;}
a {text-decoration: none; color: #000; border-bottom: 1px solid #000;}
</style>
<div style="max-width: 600; margin: auto">
<h1>Tanner Collin</h1>
<p> Hi, I'm Tanner! I do firmware and web development in Calgary.</p>
<a href="/">Contact</a> |
<a href="/r">Resume</a> |
<a href="/p">Projects</a> |
<a href="/c">Creations</a> |
<a href="/w">Writing</a>
<h2>Contact Info</h2>
<p>Email: <a href="mailto:site2@tannercollin.com">site2@tannercollin.com</a></p>
<p>Telegram: <a href="https://t.me/tannercollin">@tannercollin</a></p>
</div>

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@@ -0,0 +1,69 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*- #
from __future__ import unicode_literals
import os
AUTHOR = 'Tanner Collin'
SITENAME = 'Tanner Collin'
SITEURL = ''
PATH = 'content'
TIMEZONE = 'Canada/Mountain'
DEFAULT_LANG = 'en'
# Feed generation is usually not desired when developing
FEED_ALL_ATOM = None
CATEGORY_FEED_ATOM = None
TRANSLATION_FEED_ATOM = None
AUTHOR_FEED_ATOM = None
AUTHOR_FEED_RSS = None
DEFAULT_PAGINATION = False
MARKDOWN = {
'extension_configs': {
'markdown.extensions.codehilite': {'css_class': 'highlight'},
'markdown.extensions.extra': {},
'markdown.extensions.meta': {},
'markdown.extensions.toc': {
'toc_depth': '2-3',
'anchorlink': True,
},
},
'output_format': 'html5',
}
STATIC_PATHS = ['images', 'extra', 'text']
EXTRA_PATH_METADATA = {
#'extra/favicon.svg': {'path': 'favicon.svg'},
}
# Uncomment following line if you want document-relative URLs when developing
#RELATIVE_URLS = True
THEME = 'themes/lite'
# turn off useless outputs
TAG_SAVE_AS = ''
CATEGORY_SAVE_AS = ''
AUTHOR_SAVE_AS = ''
ARCHIVES_SAVE_AS = ''
AUTHORS_SAVE_AS = ''
CATEGORIES_SAVE_AS = ''
TAGS_SAVE_AS = ''
INDEX_SAVE_AS = 'index.html'
ARTICLE_URL = '{short}'
ARTICLE_SAVE_AS = '{short}/index.html'
PAGE_URL = '{slug}'
PAGE_SAVE_AS = '{slug}/index.html'
def list_text_files():
return sorted(os.listdir('./content/text'))
JINJA_GLOBALS = {'list_text_files': list_text_files}
PROD = True

15
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@@ -0,0 +1,15 @@
blinker==1.4
commonmark==0.9.1
docutils==0.18.1
feedgenerator==2.0.0
Jinja2==3.1.2
Markdown==3.3.6
MarkupSafe==2.1.1
pelican==4.7.2
pelican-obsidian @ git+https://git.tannercollin.com/tanner/pelican-obsidian.git@41dd1d649127ae2833f5a4b1c3b6b6cb571117d8
Pygments==2.12.0
python-dateutil==2.8.2
pytz==2022.1
rich==12.3.0
six==1.16.0
Unidecode==1.3.4

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@@ -0,0 +1,45 @@
{% extends "base.html" %}
{% block meta %}
<meta charset=UTF-8>
{% endblock %}
{% block style %}
<style>
p, h2, h3, h4, h5 {
margin: 0;
}
.toclink {
color: black;
}
.highlight > pre {
margin: 0;
padding: 0.5rem;
overflow-x: auto;
background-color: #eee;
}
:not(pre)>code {
padding: 0 2px;
font-size: 0.8rem;
background-color: #eee;
}
.aside {
display: none;
}
.toc {
display: none;
}
img {
width: 600px;
height: auto;
}
</style>
{% endblock %}
{% block content %}
<h1>{{ article.title }}</h1>
{{ article.summary }}
{{ article.locale_date }}
<hr />
{{ article.content }}
{% endblock %}

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@@ -0,0 +1,2 @@
{% block meta %}{% endblock %}<link rel=icon href=data:,>{% block style %}{% endblock %}<pre style=font:unset>{% block content %}
{% endblock %}

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@@ -0,0 +1,21 @@
{% extends "base.html" %}
{% block meta %}
{% endblock %}
{% block style %}
{% endblock %}
{% block content %}
Creations
=========
Sometimes I create art or interactive tech.
{% for article in articles if article.category.name == 'Creations' %}
<a href="/{{ article.url }}">{{ article.title }}</a>
{{ article.summary | striptags }}
{% endfor %}
{% endblock %}

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@@ -0,0 +1,44 @@
{% extends "base.html" %}
{% block content %}
Hi, I'm Tanner! I like home automation, privacy, bots,
Python, <a href=d>sensors*</a>, Debian, coffee, and makerspaces.
Please sign my <a href=g>Guest Book</a>!
Email: site3@tannercollin.com
Telegram: @tannercollin
Resume
Firmware Engineer at Cabana Blockchain, 2018-
Lead Hardware Engineer at Critical Control, 2016-2018
Electrical Engineer at Opener Aero, 2016-2016
Electrical Engineer Intern at Pason Systems, 2014-2015
BSc. Electrical Engineering from University of Calgary
Projects
<a href=q>QotNews*
<a href=n>Notica*
<a href=m>Spaceport*
<a href=t>t0txt*
<a href=y>[more]</a>
* external link
Creations
{% for article in articles_page.object_list if article.category.name == 'Creations' %}
{% if loop.index <= 4 %}
<a href={{ article.url }}>{{ article.title }}
{% endif %}
{% endfor %}
<a href=z>[more]
</a>
Writing
{% for article in articles_page.object_list if article.category.name == 'Writing' %}
<a href={{ article.url }}>{{ article.title }}
{% endfor %}
<a href=x>[more]
{% endblock %}

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@@ -0,0 +1,4 @@
<pre>
{{ page.content }}
</pre>

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@@ -0,0 +1,36 @@
{% extends "base.html" %}
{% block meta %}
{% endblock %}
{% block style %}
{% endblock %}
{% block content %}
Projects
========
My main hobby is working on software projects. I typically design websites or
build tools that make my life easier.
<a href="https://news.t0.vc/" target="_blank" rel="noreferrer noopener">QotNews*</a> - <a class="source" href="https://git.tannercollin.com/tanner/qotnews" target="_blank" rel="noreferrer noopener">source code*</a>
Hacker News, Reddit, Lobsters, and Tildes articles pre-rendered in reader mode.
Optimized for speed and distraction-free reading.
<a href="https://notica.us" target="_blank" rel="noreferrer noopener">Notica*</a> - <a class="source" href="https://github.com/tannercollin/Notica" target="_blank" rel="noreferrer noopener">source code*</a>
Send browser notifications from your terminal. No installation. No registration.
<a href="https://my.protospace.ca" target="_blank" rel="noreferrer noopener">Spaceport*</a> - <a class="source" href="https://github.com/Protospace/spaceport" target="_blank" rel="noreferrer noopener">source code*</a>
Makerspace members' portal for Calgary Protospace. It tracks membership,
courses, training, access cards, and more.
<a href="https://txt.t0.vc" target="_blank" rel="noreferrer noopener">t0txt*</a> - <a class="source" href="https://github.com/tannercollin/t0txt" target="_blank" rel="noreferrer noopener">source code*</a>
Minimal command line pastebin. Allows you to upload text notes from a bash pipe
or web browser.
<a href="https://github.com/tannercollin/standardnotes-fs" target="_blank" rel="noreferrer noopener">standardnotes-fs*</a>
A filesystem that mounts your Standard Notes account as a directory of text
files that you can edit.
* external link
{% endblock %}

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@@ -0,0 +1,28 @@
{% extends "base.html" %}
{% block meta %}
{% endblock %}
{% block style %}
{% endblock %}
{% block content %}
Writing
=======
Various articles, mostly about computers.
{% for article in articles if article.category.name == 'Writing' %}
<a href="/{{ article.url }}">{{ article.title }}</a>
{{ article.summary | striptags }}
{% endfor %}
Text Files
----------
Here are some random text notes that I share with the public.
{% for f in list_text_files() %}
<a href="../text/{{ f }}">{{ f }}</a>
{% endfor %}
{% endblock %}

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@@ -25,12 +25,7 @@
{% endblock %}
{% block info %}
Tanner Collin
<p class="contact-icons">
<a href="mailto:site2@tannercollin.com" rel="noreferrer noopener"><img alt="email" src="/theme/mail.svg" width="20" height="20" /></a>
<a href="https://t.me/tannercollin" target="_blank" rel="noreferrer noopener"><img alt="telegram" src="/theme/telegram.svg" width="20" height="20" /></a>
<a href="https://github.com/tannercollin" target="_blank" rel="noreferrer noopener"><img alt="github" src="/theme/github.svg" width="20" height="20" /></a>
</p>
<p><a href="/">Return Home</a></p>
{% endblock %}
{% block content %}
@@ -41,7 +36,6 @@
<div class="content">
{% endif %}
<p><a href="/">← Return to Home</a></p>
<header>
<h1>{{ article.title }}</h1>
<div class="summary">

View File

@@ -1,12 +1,3 @@
{% if PROD %}
<?php
$themeClass = '';
if (!empty($_COOKIE['theme'])) {
$themeClass = $_COOKIE['theme'];
}
?>
{% endif %}
<!DOCTYPE html>
<html lang="en">
<head>
@@ -18,21 +9,10 @@
<meta name="author" content="{{ AUTHOR }}" />
{% endblock head %}
<link rel="preload" href="/theme/fonts/AppSILB.ttf" as="font" type="font/ttf" crossorigin="anonymous">
<link rel="preload" href="/theme/fonts/AppSILBI.ttf" as="font" type="font/ttf" crossorigin="anonymous">
<link rel="preload" href="/theme/fonts/AppSILI.ttf" as="font" type="font/ttf" crossorigin="anonymous">
<link rel="preload" href="/theme/fonts/AppSILR.ttf" as="font" type="font/ttf" crossorigin="anonymous">
<link rel="preload" href="/theme/fonts/Lato-Bold.ttf" as="font" type="font/ttf" crossorigin="anonymous">
<link rel="preload" href="/theme/fonts/Lato-BoldItalic.ttf" as="font" type="font/ttf" crossorigin="anonymous">
<link rel="preload" href="/theme/fonts/Lato-Italic.ttf" as="font" type="font/ttf" crossorigin="anonymous">
<link rel="preload" href="/theme/fonts/Lato-Regular.ttf" as="font" type="font/ttf" crossorigin="anonymous">
<link rel="icon" href="favicon.svg">
<style>
{% include 'style.css' %}
{% include 'fonts.css' %}
</style>
<script defer src="/theme/instant-page.js"></script>
@@ -49,7 +29,10 @@
{% endblock %}
</div>
<p class="copyright">
<p class="footer">
<span class="wname">Webring:</span> <a href="https://jason.schwarzenberger.co.nz/" class="wprev">&lt; Previous</a> | <a href="https://webring.t0.vc" class="windex">Index</a> | <a href="https://udia.ca" class="wnext">Next &gt;</a>
</p>
<p class="footer">
© 20122021 Tanner Collin
</p>
</body>

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@@ -0,0 +1,10 @@
{% extends "base.html" %}
{% block meta %}
{% endblock %}
{% block style %}
{% endblock %}
{% block content %}
Nothing to see here...
{% endblock %}

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@@ -1,59 +0,0 @@
@font-face {
font-family: 'Apparatus SIL';
src: url('/theme/fonts/AppSILR.ttf') format('truetype');
font-display: swap;
}
@font-face {
font-family: 'Apparatus SIL';
font-style: italic;
src: url('/theme/fonts/AppSILI.ttf') format('truetype');
font-display: swap;
}
@font-face {
font-family: 'Apparatus SIL';
font-weight: bold;
src: url('/theme/fonts/AppSILB.ttf') format('truetype');
font-display: swap;
}
@font-face {
font-family: 'Apparatus SIL';
font-weight: bold;
font-style: italic;
src: url('/theme/fonts/AppSILBI.ttf') format('truetype');
font-display: swap;
}
@font-face {
font-family: 'Lato';
font-style: italic;
font-weight: 400;
src: local('Lato Italic'), local('Lato-Italic'), url('/theme/fonts/Lato-Italic.ttf') format('truetype');
font-display: swap;
}
@font-face {
font-family: 'Lato';
font-style: italic;
font-weight: 700;
src: local('Lato Bold Italic'), local('Lato-BoldItalic'), url('/theme/fonts/Lato-BoldItalic.ttf') format('truetype');
font-display: swap;
}
@font-face {
font-family: 'Lato';
font-style: normal;
font-weight: 400;
src: local('Lato Regular'), local('Lato-Regular'), url('/theme/fonts/Lato-Regular.ttf') format('truetype');
font-display: swap;
}
@font-face {
font-family: 'Lato';
font-style: normal;
font-weight: 700;
src: local('Lato Bold'), local('Lato-Bold'), url('/theme/fonts/Lato-Bold.ttf') format('truetype');
font-display: swap;
}

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@@ -8,11 +8,16 @@
{% endblock %}
{% block info %}
<img src="/theme/me.jpg" width="128" class="me" alt="me smiling wide and looking into the camera lit up brightly" />
<picture>
<source type="image/webp" srcset="/theme/me.webp">
<source type="image/jpeg" srcset="/theme/me.jpg">
<img src="/theme/me.jpg" width="128" height="164" class="me" alt="me smiling wide and looking into the camera lit up brightly">
</picture>
<div class="info">
<h1>Tanner Collin</h1>
<p class="contact-icons">
<a href="mailto:site2@tannercollin.com" rel="noreferrer noopener"><img alt="email" src="/theme/mail.svg" width="20" height="20" /></a>
<a href="mailto:site4@tannercollin.com" rel="noreferrer noopener"><img alt="email" src="/theme/mail.svg" width="20" height="20" /></a>
<a href="https://t.me/tannercollin" target="_blank" rel="noreferrer noopener"><img alt="telegram" src="/theme/telegram.svg" width="20" height="20" /></a>
<a href="https://github.com/tannercollin" target="_blank" rel="noreferrer noopener"><img alt="github" src="/theme/github.svg" width="20" height="20" /></a>
</p>
@@ -20,18 +25,15 @@
{% endblock %}
{% block content %}
<div class="content content-index">
<div class="content index">
<p>
Hi, I'm Tanner! I do firmware and web development in Calgary.
</p>
<div class="leftcol">
<div class="inside">
<h2>Contact Info</h2>
<p>
Email: <a href="mailto:site2@tannercollin.com">site2@tannercollin.com</a> <br />
Email: <a href="mailto:site4@tannercollin.com">site4@tannercollin.com</a> <br />
Telegram: <a href="https://t.me/tannercollin" target="_blank" rel="noreferrer noopener">@tannercollin</a>
</p>
@@ -90,16 +92,12 @@
<div class="summary">
<p>A filesystem that mounts your Standard Notes account as a directory of text files that you can edit.</p>
</div>
</div>
</div>
<div class="rightcol">
<div class="inside">
<h2>Creations</h2>
<p>Sometimes I create art or interactive tech.</p>
{% for article in articles_page.object_list if article.category.name == 'Projects' %}
{% for article in articles_page.object_list if article.category.name == 'Creations' %}
<h3><a href="{{ article.url }}">{{ article.title }}</a></h3>
<div class="summary">
{{ article.summary }}
@@ -117,6 +115,4 @@
</div>
{% endfor %}
</div>
</div>
</div>
{% endblock %}

View File

@@ -0,0 +1,10 @@
{% extends "base.html" %}
{% block meta %}
{% endblock %}
{% block style %}
{% endblock %}
{% block content %}
Nothing to see here...
{% endblock %}

View File

@@ -4,7 +4,7 @@ html {
body {
text-rendering: optimizeLegibility;
font: 1.2rem/1.0 Lato,sans-serif;
font-family: serif;
}
a {
@@ -13,22 +13,27 @@ a {
}
.info h1 {
font: 1.2rem/1.0 Lato,sans-serif;
font: 1.1rem/1.0 sans-serif;
}
.index h3 {
font: 1.1rem/1.5 serif;
}
.source {
font: 1rem/1.5 Apparatus SIL,serif;
font: 0.9rem/1.5 serif;
}
pre {
font-size: 1rem;
font-size: 0.9rem;
line-height: 1.2;
padding: 1rem;
overflow-x: auto;
}
:not(pre)>code {
padding: 0 2px;
font-size: 0.9rem;
font-size: 0.8rem;
}
.container {
@@ -36,8 +41,8 @@ pre {
margin: 2rem auto 12rem auto;
}
.copyright {
font: 1rem/1.5 Apparatus SIL,serif;
.footer {
font: 0.9rem/1.5 serif;
text-align: center;
}
@@ -58,14 +63,13 @@ pre {
}
.content p.metadata {
font: 1rem/1.0 Apparatus SIL,serif;
font: 0.9rem/1.0 serif;
font-style: italic;
}
.content div.summary p {
margin-top: -0.5rem;
margin-left: 1rem;
font-style: italic;
margin-left: 1.5rem;
}
.content {
@@ -73,19 +77,11 @@ pre {
}
.content-wide {
max-width: 46rem;;
}
.content-index {
max-width: none;
}
.content-index h3 {
font: 1.2rem/1.5 Apparatus SIL,serif;
}
.content p {
font: 1.2rem/1.5 Apparatus SIL,serif;
font: 1.1rem/1.5 serif;
}
.content ul {
@@ -93,7 +89,7 @@ pre {
}
.content li {
font: 1.2rem/1.5 Apparatus SIL,serif;
font: 1.1rem/1.5 serif;
}
.content img {
@@ -107,7 +103,7 @@ pre {
position: relative;
width: 8rem;
margin-left: -9rem;
font-size: 1rem;
font-size: 0.9rem;
}
.toclink:not(:hover) {
@@ -124,6 +120,7 @@ pre {
float: left;
width: 8rem;
text-align: right;
white-space: nowrap;
}
.bar .me {
@@ -148,9 +145,7 @@ pre {
@media screen and (max-width:36rem) {
.bar {
display: table;
overflow: auto;
margin: auto;
margin-top: -0.5rem;
}
@@ -183,30 +178,6 @@ pre {
}
}
@media screen and (min-width:58rem) {
.container {
max-width: 75rem;
}
.leftcol {
float: left;
width: 50%;
margin-top: -1rem;
}
.leftcol > .inside {
padding-right: 1rem;
}
.rightcol {
overflow: hidden;
margin-top: -1rem;
}
.rightcol > .inside {
padding-left: 1rem;
}
}
body {
background-color: #eee;

View File

@@ -0,0 +1,10 @@
{% extends "base.html" %}
{% block meta %}
{% endblock %}
{% block style %}
{% endblock %}
{% block content %}
Nothing to see here...
{% endblock %}