Move back to JBMAFP

47 files changed, 1742 insertions, 0 deletions

diff --git a/content/notes/2022-08-13-algae-spotted-on-river-sava.md b/content/notes/2022-08-13-algae-spotted-on-river-sava.md
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index 0000000..6db8c3c
--- /dev/null
+++ b/content/notes/2022-08-13-algae-spotted-on-river-sava.md
@@ -0,0 +1,30 @@
+---
+title: Aerial photography of algae spotted on river Sava
+url: /aerial-photography-of-algae-spotted-on-river-sava.html
+date: 2022-08-13T12:00:00+02:00
+type: note
+draft: false
+---
+
+This is a bit of a different post than I usually write, but quite interesting
+one to me. River Sava has plenty of hydropower plants located down the stream.
+This makes regulating the strength of a current easier than normally. Because of
+lower stream strength and high temperatures, algae has formed on the river.
+This is the first time I've seen something like this in my whole life.
+
+Below are some photographs taken from a DJI drone capturing the event.
+
+![Algae on Sava](/assets/posts/algae-sava/dji-algae-0.jpg)
+
+![Algae on Sava](/assets/posts/algae-sava/dji-algae-1.jpg)
+
+![Algae on Sava](/assets/posts/algae-sava/dji-algae-2.jpg)
+
+![Algae on Sava](/assets/posts/algae-sava/dji-algae-3.jpg)
+
+![Algae on Sava](/assets/posts/algae-sava/dji-algae-4.jpg)
+
+![Algae on Sava](/assets/posts/algae-sava/dji-algae-5.jpg)
+
+I will try to get more photos of this in the future days and if something
+intriguing shows up will post it again on the blog.
diff --git a/content/notes/2023-05-01-cachebusting-in-hugo.md b/content/notes/2023-05-01-cachebusting-in-hugo.md
new file mode 100644
index 0000000..588ee69
--- /dev/null
+++ b/content/notes/2023-05-01-cachebusting-in-hugo.md
@@ -0,0 +1,16 @@
+---
+title: Cache busting in Hugo
+url: /cachebusting-in-hugo.html
+date: 2023-05-01T12:00:00+02:00
+type: note
+draft: false
+---
+
+```html
+\{\{ $cachebuster := delimit (shuffle (split (md5 "6fab11c6669976d759d2992eff1dd5be") "" )) "" \}\}
+
+<link rel="stylesheet" href="/style.css?v=\{\{ $cachebuster \}\}">
+```
+
+This `6fab11c6669976d759d2992eff1dd5be` can be random string you generate use.
+You can use whatever you want.
diff --git a/content/notes/2023-05-05-run-9front-in-qemu.md b/content/notes/2023-05-05-run-9front-in-qemu.md
new file mode 100644
index 0000000..4425d7f
--- /dev/null
+++ b/content/notes/2023-05-05-run-9front-in-qemu.md
@@ -0,0 +1,27 @@
+---
+title: Run 9front in Qemu
+url: /run-9front-in-qemu.html
+date: 2023-05-05T12:00:00+02:00
+type: note
+draft: false
+---
+
+Run 9front in Qemu. This applies to [Plan9](https://9p.io/plan9/) and
+[9front](https://9front.org/).
+
+Download from here http://9front.org/iso/.
+
+```sh
+# Create a qcow2 image.
+qemu-img create -f qcow2 $HOME/VM/9front.qcow2.img 30G
+
+# Run the VM.
+qemu-system-x86_64 -cpu host -enable-kvm -m 1024 \
+    -net nic,model=virtio,macaddr=52:54:00:00:EE:03 -net user \
+    -device virtio-scsi-pci,id=scsi \
+    -drive if=none,id=vd0,file=$HOME/VM/9front.qcow2.img \
+    -device scsi-hd,drive=vd0 \
+    -drive if=none,id=vd1,file=$HOME/VM/ISO/9front.386.iso \
+    -device scsi-cd,drive=vd1,bootindex=0
+```
+
diff --git a/content/notes/2023-05-06-git-push-multiple-origins.md b/content/notes/2023-05-06-git-push-multiple-origins.md
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index 0000000..91429cd
--- /dev/null
+++ b/content/notes/2023-05-06-git-push-multiple-origins.md
@@ -0,0 +1,16 @@
+---
+title: Push to multiple origins at once in Git
+url: /git-push-multiple-origins.html
+date: 2023-05-06T12:00:00+02:00
+type: note
+draft: false
+---
+
+Sometimes you want to push to multiple origins at once. This is useful if you
+have a mirror of your repository on another server. You can do this by adding
+multiple push urls to your git config. This is a shorthand for command above.
+
+```sh
+git config --global alias.pushall '!sh -c "git remote | xargs -L1 git push --all"'
+```
+
diff --git a/content/notes/2023-05-07-mount-plan9-over-network.md b/content/notes/2023-05-07-mount-plan9-over-network.md
new file mode 100644
index 0000000..f1558a4
--- /dev/null
+++ b/content/notes/2023-05-07-mount-plan9-over-network.md
@@ -0,0 +1,22 @@
+---
+title: Mount Plan9 over network
+url: /mount-plan9-over-network.html
+date: 2023-05-07T12:00:00+02:00
+type: note
+draft: false
+---
+
+- First install libfuse with sudo apt install libfuse-dev.
+- Then clone https://github.com/ftrvxmtrx/9pfs and compile it with make.
+- Copy 9pfs to your path.
+
+```sh
+# On Plan9 side
+ip/ipconfig # enables network
+aux/listen1 -tv tcp!*!9999 /bin/exportfs -r tmp # export tmp folder
+
+# On Linux side
+9pfs 172.18.0.1 -p 9999 local_folder # mount
+umount local_folder # unmount
+```
+
diff --git a/content/notes/2023-05-08-write-iso-usb.md b/content/notes/2023-05-08-write-iso-usb.md
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index 0000000..35faf1f
--- /dev/null
+++ b/content/notes/2023-05-08-write-iso-usb.md
@@ -0,0 +1,14 @@
+---
+title: Write ISO to USB Key
+url: /write-iso-usb.html
+date: 2023-05-08T12:00:00+02:00
+type: note
+draft: false
+---
+
+Write ISO to USB key. Nothing fancy here.
+
+```sh
+sudo dd if=iso_file.iso of=/dev/sdX bs=4M status=progress conv=fdatasync
+```
+
diff --git a/content/notes/2023-05-09-catv-weechat-config.md b/content/notes/2023-05-09-catv-weechat-config.md
new file mode 100644
index 0000000..7155c36
--- /dev/null
+++ b/content/notes/2023-05-09-catv-weechat-config.md
@@ -0,0 +1,20 @@
+---
+title: "#cat-v on weechat configuration"
+url: /catv-weechat-config.html
+date: 2023-05-09T12:00:00+02:00
+type: note
+draft: false
+---
+
+Set up weechat to connect to #cat-v on oftc. This applies to
+[weechat](https://weechat.org/) but should be similar for other irc clients.
+
+```sh
+# Install weechat and launch it and execute the following commands.
+
+/server add oftc irc.oftc.net -tls
+/set irc.server.oftc.autoconnect on
+/set irc.server.oftc.autojoin "#cat-v"
+/set irc.server.oftc.nicks "nick1,nick2,nick3"
+```
+
diff --git a/content/notes/2023-05-10-plan9-screenshot.md b/content/notes/2023-05-10-plan9-screenshot.md
new file mode 100644
index 0000000..db64e95
--- /dev/null
+++ b/content/notes/2023-05-10-plan9-screenshot.md
@@ -0,0 +1,21 @@
+---
+title: Take a screenshot in Plan9
+url: /plan9-screenshot.html
+date: 2023-05-10T12:00:00+02:00
+type: note
+draft: false
+---
+
+Take a screenshot in Plan9. This applies to [Plan9](https://9p.io/plan9/) and
+[9front](https://9front.org/). This will take a screenshot of the screen and
+output it to `/dev/screen`. You can then use `topng` to convert it to a png
+image.
+
+```sh
+# Instant screenshot.
+cat /dev/screen | topng > screen.png
+
+# Delayed screenshot (5 seconds).
+sleep 5; cat /dev/screen | topng > screen.png
+```
+
diff --git a/content/notes/2023-05-11-fix-plan9-bootloader.md b/content/notes/2023-05-11-fix-plan9-bootloader.md
new file mode 100644
index 0000000..69c4408
--- /dev/null
+++ b/content/notes/2023-05-11-fix-plan9-bootloader.md
@@ -0,0 +1,19 @@
+---
+title: Fix bootloader not being written in Plan9
+url: /fix-plan9-bootloader.html
+date: 2023-05-11T12:00:00+02:00
+type: note
+draft: false
+---
+
+If the bootloader is not being written to a disk when installing 9front on real
+harware try clearing first sector of the disk with the following command.
+
+```sh
+dd if=/dev/zero of=/dev/sdX bs=512 count=1
+
+# If command above doesn't work try this one, wait couple of seconds and
+# press delete key to stop the command.
+cat </dev/zero >/dev/sd*/data
+```
+
diff --git a/content/notes/2023-05-12-install-plan9port-linux.md b/content/notes/2023-05-12-install-plan9port-linux.md
new file mode 100644
index 0000000..2ae5494
--- /dev/null
+++ b/content/notes/2023-05-12-install-plan9port-linux.md
@@ -0,0 +1,20 @@
+---
+title: Install Plan9port on Linux
+url: /install-plan9port-linux.html
+date: 2023-05-12T12:00:00+02:00
+type: note
+draft: false
+---
+
+Install Plan9port on Linux. This applies to
+[Plan9port](https://9fans.github.io/plan9port/). This is a port of many Plan 9
+programs to Unix-like operating systems. Useful for programs like `9term` and
+`rc`.
+
+```sh
+sudo apt-get install gcc libx11-dev libxt-dev libxext-dev libfontconfig1-dev
+git clone https://github.com/9fans/plan9port $HOME/plan9
+cd $HOME/plan9/plan9port
+./INSTALL -r $HOME/plan9
+```
+
diff --git a/content/notes/2023-05-13-download-youtube-videos.md b/content/notes/2023-05-13-download-youtube-videos.md
new file mode 100644
index 0000000..2ac6e76
--- /dev/null
+++ b/content/notes/2023-05-13-download-youtube-videos.md
@@ -0,0 +1,24 @@
+---
+title: Download list of YouTube files
+url: /download-youtube-videos.html
+date: 2023-05-13T12:00:00+02:00
+type: note
+draft: false
+---
+
+If you need to download a list of YouTube videos and don't want to download the
+actual YouTube list (which `yt-dlp` supports), you can use the following method.
+
+```js
+// Used to get list of raw URL's from YouTube's video tab'.
+// Copy them into videos.txt.
+document.querySelectorAll('#contents a.ytd-thumbnail.style-scope.ytd-thumbnail').forEach(el => console.log(el.href))
+```
+
+Download and install https://github.com/yt-dlp/yt-dlp.
+
+```sh
+# This will download all videos in videos.txt.
+yt-dlp --batch-file videos.txt -N `nproc` -f webm
+```
+
diff --git a/content/notes/2023-05-14-convert-mkv.md b/content/notes/2023-05-14-convert-mkv.md
new file mode 100644
index 0000000..0aa96fd
--- /dev/null
+++ b/content/notes/2023-05-14-convert-mkv.md
@@ -0,0 +1,21 @@
+---
+title: Convert all MKV files into other formats
+url: /convert-mkv.html
+date: 2023-05-14T12:00:00+02:00
+type: note
+draft: false
+---
+
+You will need `ffmpeg` installed on your system. This will convert all MKV files
+into WebM format.
+
+```sh
+# Convert all MKV files into WebM format.
+find ./ -name '*.mkv' -exec bash -c 'ffmpeg -i "$0" -vcodec libvpx -acodec libvorbis -cpu-used 5 -threads 8 "${0%%.mp4}.webm"' {} \;
+```
+
+```sh
+# Convert all MKV files into MP4 format.
+find ./ -name '*.mkv' -exec bash -c 'ffmpeg -i "$0" c:a copy -c:v copy -cpu-used 5 -threads 8 "${0%%.mp4}.mp4"' {} \;
+```
+
diff --git a/content/notes/2023-05-15-preview-troff-man-pages.md b/content/notes/2023-05-15-preview-troff-man-pages.md
new file mode 100644
index 0000000..f5cbade
--- /dev/null
+++ b/content/notes/2023-05-15-preview-troff-man-pages.md
@@ -0,0 +1,19 @@
+---
+title: Previews how man page written in Troff will look like
+url: /preview-troff-man-pages.html
+date: 2023-05-15T12:00:00+02:00
+type: note
+draft: false
+---
+
+Troff is used to write man pages and it is difficult to read it so this will
+preview how it will look like when it is rendered.
+
+```sh
+# On Linux system.
+groff -man -Tascii filename
+
+# On Plan9 system.
+man 1 filename
+```
+
diff --git a/content/notes/2023-05-16-mass-set-permission.md b/content/notes/2023-05-16-mass-set-permission.md
new file mode 100644
index 0000000..4a32931
--- /dev/null
+++ b/content/notes/2023-05-16-mass-set-permission.md
@@ -0,0 +1,15 @@
+---
+title: Change permissions of matching files recursively
+url: /mass-set-permission.html
+date: 2023-05-16T12:00:00+02:00
+type: note
+draft: false
+---
+
+Replace `*.xml` with your pattern. This will remove executable bit from all
+files matching the pattern. Change `+` to `-` to add executable bit.
+
+```sh
+find . -type f -name "*.xml" -exec chmod -x {} +
+```
+
diff --git a/content/notes/2023-05-22-non-blocking-shell-exec-csharp.md b/content/notes/2023-05-22-non-blocking-shell-exec-csharp.md
new file mode 100644
index 0000000..afe7491
--- /dev/null
+++ b/content/notes/2023-05-22-non-blocking-shell-exec-csharp.md
@@ -0,0 +1,43 @@
+---
+title: Execute not blocking async shell command in C#
+url: /non-blocking-shell-exec-csharp.html
+date: 2023-05-22T12:00:00+02:00
+type: note
+draft: false
+---
+
+Execute a shell command in async in C# while not blocking the UI thread.
+
+```c#
+private async Task executeCopyCommand()
+{
+  await Task.Run(() =>
+  {
+    var processStartInfo = new ProcessStartInfo("cmd", "/c dir")
+    {
+      RedirectStandardOutput = true,
+      UseShellExecute = false,
+      CreateNoWindow = true
+    };
+
+    var process = new Process
+    {
+      StartInfo = processStartInfo
+    };
+
+    process.Start();
+    process.WaitForExit();
+  });
+}
+```
+
+Make sure that `async` is present in the function definition and `await` is used
+in the method that calls `executeCopyCommand()`.
+
+```c#
+private async void button_Click(object sender, EventArgs e)
+{
+  await executeCopyCommand();
+}
+```
+
diff --git a/content/notes/2023-05-23-extend-lua-with-custom-c.md b/content/notes/2023-05-23-extend-lua-with-custom-c.md
new file mode 100644
index 0000000..013616b
--- /dev/null
+++ b/content/notes/2023-05-23-extend-lua-with-custom-c.md
@@ -0,0 +1,53 @@
+---
+title: Extend Lua with custom C functions using Clang
+url: /extend-lua-with-custom-c.html
+date: 2023-05-23T12:00:00+02:00
+type: note
+draft: false
+---
+
+Here is a boilerplate for extending Lua with custom C functions. This requires
+Clang and Lua 5.1 to be installed. GCC can be used instead of Clang, but the
+Makefile will need to be modified.
+
+- nativefunc.c
+
+  ```c
+  #include <lua.h>
+  #include <lauxlib.h>
+
+  static int l_mult50(lua_State *L) {
+    double number = luaL_checknumber(L, 1);
+    lua_pushnumber(L, number * 50);
+    return 1;
+  }
+
+  int luaopen_nativefunc(lua_State *L) {
+    static const struct luaL_Reg nativeFuncLib[] = { {"mult50", l_mult50}, {NULL, NULL} };
+
+    luaL_register(L, "nativelib", nativeFuncLib);
+    return 1;
+  }
+  ```
+
+- main.lua
+
+  ```lua
+  require "nativefunc"
+  print(nativelib.mult50(50))
+  ```
+
+- Makefile
+
+  ```Makefile
+  CC       = clang
+  CFLAGS   =
+  INCLUDES = `pkg-config lua5.1 --cflags-only-I`
+
+  all:
+    $(CC) -shared -o nativefunc.so -fPIC nativefunc.c $(CFLAGS) $(INCLUDES)
+
+  clean:
+    rm *.so
+  ```
+
diff --git a/content/notes/2023-05-23-parse-rss-with-lua.md b/content/notes/2023-05-23-parse-rss-with-lua.md
new file mode 100644
index 0000000..7802c31
--- /dev/null
+++ b/content/notes/2023-05-23-parse-rss-with-lua.md
@@ -0,0 +1,39 @@
+---
+title: Parse RSS feeds with Lua
+url: /parse-rss-with-lua.html
+date: 2023-05-23T12:00:00+02:00
+type: note
+draft: false
+---
+
+Example of parsing RSS feeds with Lua. Before running the script install:
+
+- feedparser with `luarocks install feedparser`
+- luasocket with `luarocks install luasocket`
+
+```lua
+local http = require("socket.http")
+local feedparser = require("feedparser")
+
+local feed_url = "https://mitjafelicijan.com/index.xml"
+
+local response, status, _ = http.request(feed_url)
+if status == 200 then
+  local parsed = feedparser.parse(response)
+
+  -- Print out feed details.
+  print("> Title   ", parsed.feed.title)
+  print("> Author  ", parsed.feed.author)
+  print("> ID      ", parsed.feed.id)
+  print("> Entries ", #parsed.entries)
+
+  for _, item in ipairs(parsed.entries) do
+    print("GUID    ", item.guid)
+    print("Title   ", item.title)
+    print("Link    ", item.link)
+    print("Summary ", item.summary)
+  end
+else
+  print("! Request failed. Status:", status)
+end
+```
diff --git a/content/notes/2023-05-24-fresh-9front-desktop.md b/content/notes/2023-05-24-fresh-9front-desktop.md
new file mode 100644
index 0000000..1d8deed
--- /dev/null
+++ b/content/notes/2023-05-24-fresh-9front-desktop.md
@@ -0,0 +1,13 @@
+---
+title: My brand new Plan9/9front desktop
+url: /fresh-9front-desktop.html
+date: 2023-05-24T12:00:00+02:00
+type: note
+draft: false
+---
+
+I have been experimenting with Plan9/9front for a week now. Noice! This is how
+my desktop looks like.
+
+![9front desktop](/assets/notes/9front-desktop.png)
+
diff --git a/content/notes/2023-05-25-dcss-new-player-guide.md b/content/notes/2023-05-25-dcss-new-player-guide.md
new file mode 100644
index 0000000..a19e2ea
--- /dev/null
+++ b/content/notes/2023-05-25-dcss-new-player-guide.md
@@ -0,0 +1,97 @@
+---
+title: Dungeon Crawl Stone Soup - New player guide
+url: /dcss-new-player-guide.html
+date: 2023-05-25T22:00:00+02:00
+type: note
+draft: false
+---
+
+An amazing game deserves an amazing guide. All this material can be find in some
+form on another on [craw's](https://github.com/crawl/crawl) official repository.
+
+- [DCSS Quickstart](/assets/notes/dcss-quickstart.pdf) - Very short introduction to the
+  game
+- [DCSS Manual](/assets/notes/dcss_manual.pdf) - Extensive manual about the game
+
+![Dungeon Crawl Stone Soup](/assets/notes/dcss.jpg)
+
+**Movement and Exploration**
+
+- You can move around with the numpad (try numlock on and off), vi-keys, or
+  clicking with the mouse. Arrow keys work, though you can't move diagonally
+  with them. Pressing Shift and a direction will move until you see/hit
+  something.
+- Pressing `>` will take you down a staircase, and `<` to go up a staircase.
+- You can open doors by walking into them, and close them with `C`.
+- You can autoexplore by pressing `o`.
+- You can re-view recent messages with `Ctrl-p`.
+
+**Monsters and Combat**
+
+- You can pick up items with `,` or `g`.
+- Wield weapons with `w`. Weapons have different stats.
+  - (You may also engage in Unarmed Combat, though it isn't very effective when
+    untrained).
+- Attack monsters in melee by walking in their direction (or with
+  Ctrl-direction).
+- You can wait with `.` or `s`, passing your turn - such as to get monsters into
+  a corridor with you.
+- You can rest with `5`, waiting until you are fully healed, or something
+  noteworthy happens.
+- Either mouseover and rightclick, or use `x` then `v` on the monster to examine
+  monsters. Monsters with a red border are 'dangerous' relative to your current
+  XP level (XL).
+- Quiver (often ranged) actions for further use with `Q`.
+- You can fire ranged weapons manually with `f`, or auto-target your quiver with
+  `p` or `Shift-Tab`. Throwing weapons can be thrown immediately, while
+  launchers (like bows) need to be wielded first.
+
+**Items and Inventory**
+
+- View your inventory by pressing `i`. Most item related commands can also be
+  done with this menu.
+- You can wear amour with `W;` amour gives `AC`, while heavier body armour
+  reduces `EV`.
+- Autoexplore will automatically pick up useful items, such as potions and
+  scrolls, if you aren't in danger.
+- You can read scrolls with `r` and drink ("quaff") potions with `q`.
+- Equipment items may have brands, with special properties. Branded equipment is
+  blue when unidentified.
+- Equipment items may be artifacts, often with unique properties, and are
+  unmodifiable. They are written in white.
+- You can evoke wands with `V`.
+- You can put on jewelry with `P`, and remove it with `R`.
+- Gold is used in shops, which can be interacted with by either `>` or `<`.
+
+**Magic and Spellcasting**
+
+- Once you find a spellbook, you can memorize spells with `M`.
+- You need to be the same XL as the spell's spell level in order to learn it, in
+  addition to training magical skill (to lower failure rate).
+- Cast spells by pressing `z`, then the letter assigned to the spell. You may
+  also Quiver a spell and then use it like a ranged weapon (with Shift-Tab).
+- You can view your memorized spells by pressing `I` (capital-i) or `z`.
+- Like HP, you can recover MP by resting (with 5).
+- Many spells can be positioned more effectively, or combined with other spells,
+  in order to get (more effective) use out of them.
+- Heavier body amour and shields hamper spellcasting.
+
+**Gods and Divine Abilities**
+
+- You may look at a god's overview by praying at their altar (with `>` or `<`).
+  After praying, you can worship the god by pressing Enter afterwards.
+- Gods all have unique features about them. Trog, the god of the tutorial, is
+  also the god of rage and bloodshed, and so despises spellcasting.
+- Gods like and dislike different things. Most gods either like killing things
+  (like Trog) or exploring new areas (like Elyvilon), rewarding you piety
+  (divine favor) for doing so.
+- You should learn to use and even rely on divine abilities often, as they are
+  usually very strong. Trog's Berserk gives you 1.5x health, 1.5x speed (to all
+  valid actions), and a big damage boost. Note that Berserk prevents most
+  actions other than move and melee attack, and runs out very quickly if you
+  aren't attacking. And after berserk ends, you are slowed down and can't
+  berserk again for a short time.
+- In addition, the vast majority of abilities consume piety in the process.
+  Regardless, this ability is very cheap, and the benefits are incredible, so
+  don't hold back!
+- Pressing `^` will let you view your current god, abilities, and piety.
diff --git a/content/notes/2023-05-25-show-xterm-colors.md b/content/notes/2023-05-25-show-xterm-colors.md
new file mode 100644
index 0000000..79781e2
--- /dev/null
+++ b/content/notes/2023-05-25-show-xterm-colors.md
@@ -0,0 +1,83 @@
+---
+title: Display xterm color palette
+url: /xterm-color-palette.html
+date: 2023-05-25T12:00:00+02:00
+type: note
+draft: false
+---
+
+- `bash xterm-palette.sh` - will show you number of max colors available
+- `bash xterm-palette.sh -v` - will create a list of all colors with codes
+
+![xterm color palette](/assets/notes/xterm-palette.png)
+
+```sh
+#!/usr/bin/env bash
+# xterm-palette.sh
+
+trap 'tput sgr0' exit           # Clean up even if user hits ^C
+
+function setfg () {
+    printf '\e[38;5;%dm' $1
+}
+
+function setbg () {
+    printf '\e[48;5;%dm' $1
+}
+
+function showcolors() {
+    # Given an integer, display that many colors
+    for ((i=0; i<$1; i++))
+    do
+        printf '%4d ' $i
+        setbg $i
+        tput el
+        tput sgr0
+        echo
+    done
+    tput sgr0 el
+}
+
+# First, test if terminal supports OSC 4 at all.
+printf '\e]4;%d;?\a' 0
+read -d $'\a' -s -t 0.1 </dev/tty
+if [ -z "$REPLY" ]
+then
+    # OSC 4 not supported, so we'll fall back to terminfo
+    max=$(tput colors)
+else
+    # OSC 4 is supported, so use it for a binary search
+    min=0
+    max=256
+    while [[ $((min+1)) -lt $max ]]
+    do
+        i=$(( (min+max)/2 ))
+        printf '\e]4;%d;?\a' $i
+        read -d $'\a' -s -t 0.1 </dev/tty
+        if [ -z "$REPLY" ]
+        then
+            max=$i
+        else
+            min=$i
+        fi
+    done
+fi
+
+
+# If -v is given, show all the colors
+case ${1-none} in
+    none)
+        echo $max
+        ;;
+    -v)
+        showcolors $max
+        ;;
+    *)
+        if [[ "$1" -gt 0 ]]; then
+            showcolors $1
+        else
+            echo $max
+        fi
+        ;;
+esac | less --raw-control-chars --QUIT-AT-EOF --no-init
+```
diff --git a/content/notes/2023-05-25-tmux-sane-defaults.md b/content/notes/2023-05-25-tmux-sane-defaults.md
new file mode 100644
index 0000000..2840af8
--- /dev/null
+++ b/content/notes/2023-05-25-tmux-sane-defaults.md
@@ -0,0 +1,36 @@
+---
+title: Sane defaults for tmux with more visible statusbar
+url: /tmux-sane-defaults.html
+date: 2023-05-25T12:00:00+02:00
+type: note
+draft: false
+---
+
+```conf
+# Remap prefix from 'C-b' to 'M-a'.
+unbind C-b
+set-option -g prefix M-a
+bind-key M-a send-prefix
+
+# Split panes using | and -.
+bind | split-window -h
+bind - split-window -v
+unbind '"'
+unbind %
+
+# Start counting windows with 1.
+set-option -g allow-rename on
+set -g base-index 1
+setw -g pane-base-index 1
+
+# Statusbar: purple bg and white fg.
+set -g status-bg '#480b8e'
+set -g status-fg '#ffffff'
+
+# Active window: black bg and white fg. 
+set -g window-status-current-format "#[fg=#ffffff]#[bg=#111111]#[fg=#ffffff]#[bg=#111111] #I:#W #[fg=#ffffff]#[bg=#111111]"
+
+# Disable mouse mode (tmux 2.1 and above).
+set -g mouse off
+```
+
diff --git a/content/notes/2023-05-27-cronjobs-github-with-actions.md b/content/notes/2023-05-27-cronjobs-github-with-actions.md
new file mode 100644
index 0000000..8d44761
--- /dev/null
+++ b/content/notes/2023-05-27-cronjobs-github-with-actions.md
@@ -0,0 +1,32 @@
+---
+title: "Cronjobs on Github with Github Actions"
+url: /cronjobs-github-with-actions.html
+date: 2023-05-27T00:35:36+02:00
+type: note
+draft: false
+---
+
+In the root of your repository create a folder `.github/workflows` and in that
+folder create a file a file `cron.yaml`. This file can be named whatever you
+wish. But it has to be a `yaml` file.
+
+File below (`.github/workflows/cron.yaml`) describes an action that will trigger
+every six hours and it will curl example.com.
+
+However. Be sure that you have enough credits. Free account is not that generous
+with the minutes they give you for free. Check more about GitHub Actions usage
+on their website https://docs.github.com/en/actions.
+
+```yaml
+# .github/workflows/cron.yaml
+name: Do a curl every 6 hours
+on:
+  schedule:
+    - cron: '0 */6 * * *'
+jobs:
+  cron:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Call some url
+        run: curl 'https://example.com'
+```
diff --git a/content/notes/2023-05-27-dcss-on-4k-displays.md b/content/notes/2023-05-27-dcss-on-4k-displays.md
new file mode 100644
index 0000000..3298c5c
--- /dev/null
+++ b/content/notes/2023-05-27-dcss-on-4k-displays.md
@@ -0,0 +1,29 @@
+---
+title: "Make DCSS playable on 4k displays"
+url: /dcss-on-4k-display.html
+date: 2023-05-27T19:35:11+02:00
+type: note
+draft: false
+---
+
+Dungeon Crawl Stone Soup has a a very small font by default. On a 4k display, it
+is barely readable. This is how I made it playable.
+
+Make a file `~/.crawlrc` with the following content:
+
+```ini
+# Adjust the sizes to your liking.
+
+tile_font_crt_size = 32
+tile_font_stat_size = 32
+tile_font_msg_size = 32
+tile_font_tip_size = 32
+tile_font_lbl_size = 32
+tile_sidebar_pixels = 64
+```
+
+To zoom in and out in viewport, press `Ctrl+` and `Ctrl-` respectively.
+
+All the possible options are documented in the [Dungeon Crawl Stone Soup Options
+Guide](https://github.com/crawl/crawl/blob/master/crawl-ref/docs/options_guide.txt)
+file.
diff --git a/content/notes/2023-05-27-drawing-pixels-in-plan9.md b/content/notes/2023-05-27-drawing-pixels-in-plan9.md
new file mode 100644
index 0000000..5b5115d
--- /dev/null
+++ b/content/notes/2023-05-27-drawing-pixels-in-plan9.md
@@ -0,0 +1,82 @@
+---
+title: "Drawing Pixels in Plan9"
+url: /drawing-pixels-in-plan9.html
+date: 2023-05-27T17:41:33+02:00
+type: note
+draft: false
+---
+
+I have started exploring Plan9's graphics capabilities. This is a hello world
+alternative for drawing that draws a yellow square on a blue background.
+
+More information:
+
+- [draw.h header file](https://github.com/0intro/plan9/blob/main/sys/include/draw.h)
+  contains all the drawing functions
+- [draw man page](https://9fans.github.io/plan9port/man/man3/draw.html)
+  has a bit more digestable descriptions of the draw functions
+- [graphics man page](https://9fans.github.io/plan9port/man/man3/graphics.html)
+  has a bit more digestable descriptions of the graphics functions
+- [all man pages](https://9fans.github.io/plan9port/man/man3/)
+  can be a valuable resource for learning about the system
+
+![Plan9 Howdy World!](/assets/notes/plan9-pixels.png)
+
+```c
+// main.c
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <cursor.h>
+
+void
+main()
+{
+  ulong co;
+  Image *im, *bg;
+  co = 0x0000FFFF;
+
+  if (initdraw(nil, nil, argv0) < 0)
+  {
+    sysfatal("%s: %r", argv0);
+  }
+
+  im = allocimage(display, Rect(0, 0, 300, 300), RGB24, 0, DYellow);
+  bg = allocimage(display, Rect(0, 0, 1, 1), RGB24, 1, co);
+
+  if (im == nil || bg == nil)
+  {
+    sysfatal("not enough memory");
+  }
+
+  draw(screen, screen->r, bg, nil, ZP);
+  draw(screen, screen->r, im, nil, Pt(-40, -40));
+
+  flushimage(display, Refnone);
+
+  // Wait 10 seconds before exiting.
+  sleep(10000);
+
+  exits(nil);
+}
+```
+
+And then compile with `mk` (mkfile below):
+
+```makefile
+# mkfile
+</$objtype/mkfile
+
+RC=/rc/bin
+BIN=/$objtype/bin
+MAN=/sys/man
+
+main:
+        $CC $CFLAGS main.c
+        $LD $LDFLAGS -o main main.$O
+```
+
+And run with `./main`. To exit the program, press `Delete key` (strange but this
+is the alternative for Ctrl+C).
+
+*This is **very cool** indeed!*
diff --git a/content/notes/2023-05-28-easy-time-took-in-bash.md b/content/notes/2023-05-28-easy-time-took-in-bash.md
new file mode 100644
index 0000000..42f2091
--- /dev/null
+++ b/content/notes/2023-05-28-easy-time-took-in-bash.md
@@ -0,0 +1,24 @@
+---
+title: "Easy measure time took in a bash script"
+url: /easy-time-took-in-bash.html
+date: 2023-05-28T17:53:20+02:00
+type: note
+draft: false
+---
+
+In Bash, the `$SECONDS` variable is a special variable that automatically keeps
+track of the number of seconds since the current shell or script started
+executing. It starts counting from the moment the script begins running.
+
+```bash
+#!/bin/bash
+
+# Reset the timer to zero.
+SECONDS=0
+
+# Do something.
+sleep 5
+
+# Print the time elapsed.
+echo "Time taken: $SECONDS seconds"
+```
diff --git a/content/notes/2023-05-29-grep-to-less-maintain-colors.md b/content/notes/2023-05-29-grep-to-less-maintain-colors.md
new file mode 100644
index 0000000..718dda8
--- /dev/null
+++ b/content/notes/2023-05-29-grep-to-less-maintain-colors.md
@@ -0,0 +1,24 @@
+---
+title: "Grep to Less that maintain colors"
+url: /grep-to-less-maintain-colors.html
+date: 2023-05-29T21:27:07+02:00
+type: note
+draft: false
+---
+
+I often use `grep` to search for todo's in my code and other people's code and
+then pipe them in `less` and I missed having colors that grep outputs in `less`.
+
+- Grep's `--color=always` use markers to highlight the matching strings.
+- Less's `-R` option outputs "raw" control characters.
+
+You could use `alias grep='grep --color=always'` and `alias less='less -R'` or
+create todo function in your `.bashrc` that accepts first argument as search
+string.
+
+```sh
+# This is where the magic happens.
+grep --color=always -rni "TODO:" | less -R
+```
+
+![Less and grep](/assets/notes/grep-less.png)
diff --git a/content/notes/2023-05-31-extending-dte-editor.md b/content/notes/2023-05-31-extending-dte-editor.md
new file mode 100644
index 0000000..8135bdc
--- /dev/null
+++ b/content/notes/2023-05-31-extending-dte-editor.md
@@ -0,0 +1,51 @@
+---
+title: "Extending dte editor"
+url: /extending-dte-editor.html
+date: 2023-05-31T08:12:45+02:00
+type: note
+draft: false
+---
+
+[`dte`](https://craigbarnes.gitlab.io/dte/) is an interesting editor I started
+using lately more and more. Since it is using
+[`execvp()`](https://linux.die.net/man/3/execvp) it can be easily extended. I
+needed comment/uncomment feature so I created a small utility that does this for
+me. Code lives on repository [dte
+extensions](https://git.mitjafelicijan.com/dte-extensions.git/about/) but this
+utilities can be used for whatever you want. Make sure you have version 1.11 or
+above.
+
+Next one will be invoking formatter based on the type of a file.
+
+My config that works for me.
+
+```sh
+set show-line-numbers true;
+set tab-width 4;
+set case-sensitive-search false;
+
+# Special aliases
+alias m_comment 'exec -s -i line -o buffer -e errmsg ~/.dte/bin/comment'
+alias m_format 'save; exec go fmt .; reload'
+alias m_duplicate 'copy;paste';
+
+# Useful aliases.
+alias m_force_close 'quit -f';
+alias m_reload 'close; open $FILE'
+
+# Key bindings.
+bind M-s save;
+bind M-q m_force_close;
+bind M-z refresh;
+bind C-down blkdown;
+bind C-up blkup;
+bind C-_ m_comment;
+bind M-. m_format;
+bind C-d m_duplicate;
+
+# Syntax highlighting.
+hi preproc magenta;
+hi keyword red;
+hi linenumber blue;
+hi comment cyan;
+```
diff --git a/content/notes/2023-06-01-ewd-manuscripts-ebook.md b/content/notes/2023-06-01-ewd-manuscripts-ebook.md
new file mode 100644
index 0000000..ac58fe0
--- /dev/null
+++ b/content/notes/2023-06-01-ewd-manuscripts-ebook.md
@@ -0,0 +1,21 @@
+---
+title: "Edsger W. Dijkstra Manuscripts ebook"
+url: /ewd-manuscripts-ebook.html
+date: 2023-06-01T22:47:56+02:00
+type: note
+draft: false
+---
+
+I love reading the original manuscripts of Edsger W. Dijkstra. They are
+available online at the University of Texas at Austin website, but I also found
+MOBI version. I converted it into ePub as well.
+
+Downloads:
+
+- [MOBI version of all Manuscripts](https://mitjafelicijan.fra1.digitaloceanspaces.com/haphazard/ewd-manuscripts.mobi)
+- [ePub version of all Manuscripts](https://mitjafelicijan.fra1.digitaloceanspaces.com/haphazard/ewd-manuscripts.epub)
+
+Sources and credits:
+
+- [Original manuscripts from University of Texas at Austin](https://www.cs.utexas.edu/users/EWD/index00xx.html)
+- [Original repository of MOBI version](https://github.com/evmn/The-Manuscripts-of-Edsger-W.-Dijkstra)
diff --git a/content/notes/2023-06-04-bulk-make-thumbnails.md b/content/notes/2023-06-04-bulk-make-thumbnails.md
new file mode 100644
index 0000000..d3a7d62
--- /dev/null
+++ b/content/notes/2023-06-04-bulk-make-thumbnails.md
@@ -0,0 +1,20 @@
+---
+title: "Bulk thumbnails"
+url: /bulk-make-thumbnails.html
+date: 2023-06-04T20:46:56+02:00
+type: note
+draft: false
+---
+
+Make bulk thumbnails of JPGs with ImageMagick.
+
+```sh
+#!/bin/bash
+
+directory="./images/"
+dimensions="360x360"
+
+for file in "$directory"*.jpg; do
+  convert "$file" -resize $dimensions "$file" "${file%.*}-thumbnail.jpg"
+done
+```
diff --git a/content/notes/2023-06-21-presentations-with-markdown.md b/content/notes/2023-06-21-presentations-with-markdown.md
new file mode 100644
index 0000000..a264eec
--- /dev/null
+++ b/content/notes/2023-06-21-presentations-with-markdown.md
@@ -0,0 +1,77 @@
+---
+title: "Simple presentations with Markdown"
+url: /presentations-with-markdown.html
+date: 2023-06-21T08:54:48+02:00
+type: note
+draft: false
+---
+
+A simple way to make presentations without using desktop apps or using online
+services is https://github.com/remarkjs/remark.
+
+First create `index.html` and be sure you make changes to `config` variable.
+
+```html
+<!DOCTYPE html>
+<html>
+
+<head>
+    <title></title>
+    <meta charset="utf-8">
+    <style>
+        body {
+            font-family: 'SF Pro Display';
+        }
+
+        .remark-code,
+        .remark-inline-code {
+            font-family: 'SF Mono';
+            font-size: medium;
+            background-color: gainsboro;
+            border-radius: 5px;
+            padding: 0 5px;
+        }
+    </style>
+</head>
+
+<body>
+    <textarea id="source"></textarea>
+    <script src="https://remarkjs.com/downloads/remark-latest.min.js"></script>
+    <script>
+                const config = {
+                        title: 'My presentation',
+                        file: 'presentation.md',
+                };
+        
+                document.title = config.title;
+        remark.create({ sourceUrl: config.file });
+    </script>
+</body>
+
+</html>
+```
+
+Now the markdown file `presentation.md` with presenetation. `---` is used to
+separate slides. Other stuff is just pure markdown.
+
+```md
+class: center, middle
+
+# Main title of the presentation
+
+---
+
+# Fist slide
+
+Eveniet mollitia nemo architecto rerum aut iure iste. Sit nihil nobis libero iusto fugit nam laudantium ut. Dignissimos corrupti laudantium nisi.
+
+- Lorem ipsum dolor sit amet, consectetur adipiscing elit.
+- Integer aliquet mauris a felis fringilla, ut congue massa finibus.
+
+---
+
+# Slide two
+
+- Lorem ipsum dolor sit amet, consectetur adipiscing elit.
+- Vestibulum eget leo ac dolor venenatis pulvinar.
+```
diff --git a/content/notes/2023-06-24-making-cgit-look-nicer.md b/content/notes/2023-06-24-making-cgit-look-nicer.md
new file mode 100644
index 0000000..d145cb5
--- /dev/null
+++ b/content/notes/2023-06-24-making-cgit-look-nicer.md
@@ -0,0 +1,205 @@
+---
+title: "Making cgit look nicer"
+url: /making-cgit-look-nicer.html
+date: 2023-06-24T13:33:58+02:00
+type: note
+draft: false
+---
+
+For personal use I have a [private Git server](https://git.mitjafelicijan.com)
+set up and I use GitHub just as a mirror. By default the cgit theme looks a bit
+dated so I made the flowing theme.
+
+- `/etc/cgitrc`
+
+```ini
+css=/cgit.css
+logo=/startrek.gif
+favicon=/favicon.png
+source-filter=/usr/lib/cgit/filters/syntax-highlighting-edited.sh
+about-filter=/usr/lib/cgit/filters/about-formatting.sh
+
+local-time=1
+snapshots=tar.gz
+repository-sort=age
+cache-size=1000
+branch-sort=age
+summary-log=200
+max-atom-items=50
+max-repo-count=100
+
+enable-index-owner=0
+enable-follow-links=1
+enable-log-filecount=1
+enable-log-linecount=1
+
+root-title=Place for code, experiments and other bullshit!
+root-desc=
+clone-url=git@git.mitjafelicijan.com:/home/git/$CGIT_REPO_URL
+
+mimetype.gif=image/gif
+mimetype.html=text/html
+mimetype.jpg=image/jpeg
+mimetype.jpeg=image/jpeg
+mimetype.pdf=application/pdf
+mimetype.png=image/png
+mimetype.svg=image/svg+xml
+
+readme=:README.md
+readme=:readme.md
+
+# Must be at the end!
+virtual-root=/
+scan-path=/home/git/
+```
+
+For `syntax-highlighting-edited.sh` follow instructions on
+[https://wiki.archlinux.org/title/Cgit](https://wiki.archlinux.org/title/Cgit#Using_highlight).
+
+- `/usr/share/cgit/cgit.css`
+
+```css
+* {
+        font-size: 11pt;
+}
+
+body {
+        font-family: monospace;
+        background: white;
+        padding: 1em;
+}
+
+th, td {
+        text-align: left;
+}
+
+/* HEADER */
+
+#header {
+        margin-bottom: 1em;
+}
+
+#header .logo img {
+        display: block;
+        height: 3em;
+        margin-right: 10px;
+}
+
+#header .sub.right {
+        display: none;
+}
+
+/* FOOTER */
+
+.footer {
+        margin-top: 2em;
+        font-style: italic;
+}
+
+.footer, .footer a {
+        color: gray;
+}
+
+/* TABS */
+
+.tabs a {
+        margin-bottom: 2em;
+        display: inline-block;
+        margin-right: 1em;
+}
+
+.tabs td a:only-child {
+        display: none;
+}
+
+/* HIDING ELEMENTS */
+
+.cgit-panel, .form {
+        display: none;
+}
+
+/* LISTS */
+
+.list td, .list th {
+        padding-right: 2em;
+}
+
+.list .nohover a {
+        color: black;
+}
+
+.list .button {
+        padding-right: 0.5em;
+}
+
+/* COMMIT */
+
+.commit-subject {
+        padding: 1em 0;
+}
+
+.decoration a {
+        padding-left: 0.5em;
+}
+
+.commit-info th {
+        padding-right: 1em;
+}
+
+.commit-subject {
+        padding: 2em 0;
+}
+
+table.diff div.head {
+        padding-top: 2em;
+}
+
+table.diffstat td {
+        padding-right: 1em;
+}
+
+/* CONTENT */
+
+.linenumbers {
+        padding-right: 0.5em;
+}
+
+.linenumbers a {
+        color: gray;
+}
+
+.pager {
+        display: flex;
+        list-style-type: none;
+        padding: 0;
+        gap: 0.5em;
+}
+
+/* DIFF COLORS */
+
+table.diff {
+        width: 100%;
+}
+
+table.diff td {
+        white-space: pre;
+}
+
+table.diff td div.head {
+        font-weight: bold;
+        margin-top: 1em;
+        color: black;
+}
+
+table.diff td div.hunk {
+        color: #009;
+}
+
+table.diff td div.add {
+        color: green;
+}
+
+table.diff td div.del {
+        color: red;
+}
+```
diff --git a/content/notes/2023-06-25-alacritty-open-links-with-modifier.md b/content/notes/2023-06-25-alacritty-open-links-with-modifier.md
new file mode 100644
index 0000000..c805053
--- /dev/null
+++ b/content/notes/2023-06-25-alacritty-open-links-with-modifier.md
@@ -0,0 +1,34 @@
+---
+title: "Alacritty open links with modifier"
+url: /alacritty-open-links-with-modifier.html
+date: 2023-06-25T17:17:16+02:00
+type: note
+draft: false
+---
+
+Alacritty by default makes all links in the terminal output clickable and this
+gets annoying rather quickly. I liked the default behavior of Gnome terminal
+where you needed to hold Control key and then you could click and open links.
+
+To achieve this in Alacritty you need to provide a `hint` in the configuration
+file. Config file is located at `~/.config/alacritty/alacritty.yml`.
+
+```yaml
+hints:
+  enabled:
+  - regex: "(mailto:|gemini:|gopher:|https:|http:|news:|file:|git:|ssh:|ftp:)\
+            [^\u0000-\u001F\u007F-\u009F<>\"\\s{-}\\^⟨⟩`]+"
+    command: xdg-open
+    post_processing: true
+    mouse:
+      enabled: true
+      mods: Control
+```
+
+The following should work under any Linux system. For macOS, you will need to
+change `command: xdg-open` to something else.
+
+Now the links will be visible and clickable only when Control key is being
+pressed.
+
+Source: https://github.com/alacritty/alacritty/issues/5246
diff --git a/content/notes/2023-06-25-development-environments-with-nix.md b/content/notes/2023-06-25-development-environments-with-nix.md
new file mode 100644
index 0000000..8aa104c
--- /dev/null
+++ b/content/notes/2023-06-25-development-environments-with-nix.md
@@ -0,0 +1,67 @@
+---
+title: "Development environments with Nix"
+url: /development-environments-with-nix.html
+date: 2023-06-25T16:38:10+02:00
+type: note
+draft: false
+---
+
+Nix is amazing for making reproducible cross OS development environment.
+
+First you need to [install Nix package
+manager](https://nixos.org/download.html).
+
+- Create a file `shell.nix` in your project folder.
+- In the section that has `python3` etc add programs you want to use. These can
+  be CLI or GUI applications. It doesn't matter to Nix.
+
+```nix
+{ pkgs ? import <nixpkgs> {} }:
+  pkgs.mkShell {
+    nativeBuildInputs = with pkgs.buildPackages; [
+          python3
+          tinycc
+        ];
+}
+```
+
+And then run it `nix-shell`. By default it will look for `shell.nix` file. If
+you want to specify a different file use `nix-shell file.nix`. That is about it.
+
+When the shell is spawned it could happen that your `PS1` prompt will be
+overwritten and your prompt will look differently. In that case you need to
+either do `NIX_SHELL_PRESERVE_PROMPT=1 nix shell` or add
+`NIX_SHELL_PRESERVE_PROMPT` variable to your `bashrc` or `zshrc` file and set it
+to `1`.
+
+I also have a modified `PS1` prompt for Bash that I use and it also catches the
+usage of Nix shell.
+
+```sh
+NIX_SHELL_PRESERVE_PROMPT=1
+
+parse_git_branch() {
+        git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/'
+}
+
+is_inside_nix_shell() {
+        nix_shell_name="$(basename "$IN_NIX_SHELL" 2>/dev/null)"
+        if [[ -n "$nix_shell_name" ]]; then
+                echo " \e[0;36m(nix-shell)\e[0m"
+        fi
+}
+
+export PS1="[\033[38;5;9m\]\u@\h\[$(tput sgr0)\]]$(is_inside_nix_shell)\[\033[33m\]\$(parse_git_branch)\[\033[00m\] \w\[$(tput sgr0)\] \n$ "
+```
+
+And this is what it looks like when you are in a Nix shell. Otherwise that part
+of prompt is omitted
+
+![PS1 Prompt](/assets/notes/ps1-prompt.png)
+
+More resources:
+
+- https://nixos.wiki/wiki/Development_environment_with_nix-shell
+- https://nixos.wiki/wiki/Main_Page
+- https://itsfoss.com/why-use-nixos/
+- https://mynixos.com/
diff --git a/content/notes/2023-06-29-10gui-10-finger-multitouch-user-interface.md b/content/notes/2023-06-29-10gui-10-finger-multitouch-user-interface.md
new file mode 100644
index 0000000..cb012d4
--- /dev/null
+++ b/content/notes/2023-06-29-10gui-10-finger-multitouch-user-interface.md
@@ -0,0 +1,24 @@
+---
+title: "10/GUI 10 Finger Multitouch User Interface"
+url: /10gui-10-finger-multitouch-user-interface.html
+date: 2023-06-29T14:51:39+02:00
+type: note
+draft: false
+---
+
+Message from 10/GUI team (page 10gui.com does not exist anymore):
+
+*Over a quarter-century ago, Xerox introduced the modern graphical user
+interface paradigm we today take for granted.*
+
+*That it has endured is a testament to the genius of its design. But the
+industry is now at a crossroads: New technologies promise higher-bandwidth
+interaction, but have yet to find a truly viable implementation.*
+
+*10/GUI aims to bridge this gap by rethinking the desktop to leverage technology
+in an intuitive and powerful way.*
+
+<video
+  poster="/assets/notes/10gui-10-finger-multitouch-user-interface.jpg"
+  src="/assets/notes/10gui-10-finger-multitouch-user-interface.mp4"
+  controls></video>
diff --git a/content/notes/2023-06-29-60s-ibm-computers-commercial.md b/content/notes/2023-06-29-60s-ibm-computers-commercial.md
new file mode 100644
index 0000000..9c4328b
--- /dev/null
+++ b/content/notes/2023-06-29-60s-ibm-computers-commercial.md
@@ -0,0 +1,16 @@
+---
+title: "60's IBM Computers Commercial"
+url: /60s-ibm-computers-commercial.html
+date: 2023-06-29T22:13:45+02:00
+type: note
+draft: false
+---
+
+Likely aired during an hour-long program during the 1960s, long commercials such
+as this typically aired during hour-long programs. They would *not* have aired
+during a half-hour program.
+
+<video
+  poster="/assets/notes/60s-ibm-computers-commercial.jpg"
+  src="/assets/notes/60s-ibm-computers-commercial.mp4"
+  controls></video>
diff --git a/content/notes/2023-07-10-fix-screen-tearing-on-debian-12-xorg-and-i3.md b/content/notes/2023-07-10-fix-screen-tearing-on-debian-12-xorg-and-i3.md
new file mode 100644
index 0000000..dbc3abd
--- /dev/null
+++ b/content/notes/2023-07-10-fix-screen-tearing-on-debian-12-xorg-and-i3.md
@@ -0,0 +1,22 @@
+---
+title: "Fix screen tearing on Debian 12 Xorg and i3"
+url: /fix-screen-tearing-on-debian-12-xorg-and-i3.html
+date: 2023-07-10T04:21:48+02:00
+type: note
+draft: false
+---
+
+I have been experiencing some issues with Intel® Integrated HD Graphics 3000
+under Debian 12 with Xorg and i3. Using `picom` compositor didn't help. To fix
+this issue create new file `/etc/X11/xorg.conf.d/20-intel.conf` as root and put
+the following in the file.
+
+```txt
+Section "Device"
+  Identifier "Intel Graphics"
+  Driver "intel"
+  Option "TearFree" "true"
+EndSection
+```
+
+Reboot the system and that should be it.
diff --git a/content/notes/2023-07-10-online-radio-streaming-with-mpv-from-terminal.md b/content/notes/2023-07-10-online-radio-streaming-with-mpv-from-terminal.md
new file mode 100644
index 0000000..37b0715
--- /dev/null
+++ b/content/notes/2023-07-10-online-radio-streaming-with-mpv-from-terminal.md
@@ -0,0 +1,14 @@
+---
+title: "Online radio streaming with MPV from terminal"
+url: /online-radio-streaming-with-mpv-from-terminal.html
+date: 2023-07-10T03:34:45+02:00
+type: note
+draft: false
+---
+
+Recently I have been using my Thinkpad x220 more and there are some constraints
+I have faced with it. CPU is not as powerful as on my main machine and I really
+want to listen to some music while using the machine. Browsers really are bloat.
+
+Check out this site https://streamurl.link/ and copy the stream url and then do
+`mpv streamlink`.
diff --git a/content/notes/2023-07-14-set-color-temperature-of-displays-on-i3.md b/content/notes/2023-07-14-set-color-temperature-of-displays-on-i3.md
new file mode 100644
index 0000000..171be4e
--- /dev/null
+++ b/content/notes/2023-07-14-set-color-temperature-of-displays-on-i3.md
@@ -0,0 +1,15 @@
+---
+title: "Set color temperature of displays on i3"
+url: /set-color-temperature-of-displays-on-i3.html
+date: 2023-07-14T09:19:31+02:00
+type: note
+draft: false
+---
+
+I have been using Gnome's night shift for a while now and I have been missing
+this feature under i3wm. This can be done with
+[redshift](https://linux.die.net/man/1/redshift).
+
+- On Debian install with `sudo apt install redshift`
+- And then manually set it with `redshift -O 3000`
+- Reset the current settings with `redshift -x`
diff --git a/content/notes/2023-08-01-make-b-w-svg-charts-with-matplotlib.md b/content/notes/2023-08-01-make-b-w-svg-charts-with-matplotlib.md
new file mode 100644
index 0000000..84fb5e4
--- /dev/null
+++ b/content/notes/2023-08-01-make-b-w-svg-charts-with-matplotlib.md
@@ -0,0 +1,70 @@
+---
+title: "Make B/W SVG charts with matplotlib"
+url: /make-b-w-svg-charts-with-matplotlib.html
+date: 2023-08-01T17:04:10+02:00
+type: note
+draft: false
+---
+
+Install pip requirements.
+
+```sh
+pip install matplotlib
+pip install pandas
+```
+
+Example of data being used.
+
+```text
+Epoch,Connect (NLB),Processing (NLB),Waiting (NLB),Total (NLB),Connect (ALB),Processing (ALB),Waiting (ALB),Total (ALB)
+1,57.7,315.7,309.4,321.6,9,104.4,98.3,105.7
+2,121.9,114.4,100.3,176.9,5.8,99.1,97.1,101.1
+3,5.3,229.4,231.2,231.4,14.2,83,69.4,87.9
+4,4.2,134.5,112.2,135.3,5.3,132.4,105.5,134.1
+5,5.8,247.4,246.8,248.1,6,74.3,70.2,75.5
+6,9.9,122.9,100.6,122.7,7.5,241.1,79.3,242.3
+7,6.1,170.2,106.4,170.5,7.2,382.4,375.1,383.8
+8,6.6,194.3,201.4,195.5,7.1,130.9,104.8,132.6
+9,6.4,146.1,122.3,147.7,9.4,95.6,74,96.4
+```
+
+In the code you can use `df` as dataframes and use the headers like `df["Epoch"]`.
+This is how you get a column data with pandas.
+
+The Python code responsible for generating a chart:
+
+```python
+import csv
+import sys
+
+import matplotlib.pyplot as plt
+import pandas as pd
+
+# Read the data
+df = pd.read_csv("data.csv")
+
+# Settings
+plt.title("Connect median NLB vs ALB")
+plt.tight_layout(pad=2)
+fig = plt.gcf()
+fig.set_size_inches(10, 4)
+
+# Plotting
+plt.plot(df["Epoch"], df["Connect (ALB)"], label = "ALB", color="black", linestyle="-")
+plt.plot(df["Epoch"], df["Connect (NLB)"], label = "NLB", color="black", linestyle="--")
+
+# Adding x and y axis labels
+plt.xlabel("Epoch", fontstyle="italic")
+plt.ylabel("Median value (ms)", fontstyle="italic")
+
+# Legend
+legend = plt.legend()
+legend.get_frame().set_linewidth(0)
+
+# Export as SVG
+plt.savefig("plot.svg", format="svg")
+```
+
+![SVG Chart](/assets/notes/plot.svg)
+
+The image above is SVG and you can zoom in and out and check that the image is vector.
diff --git a/content/notes/2023-09-18-aws-eb-pyyaml-fix.md b/content/notes/2023-09-18-aws-eb-pyyaml-fix.md
new file mode 100644
index 0000000..b394eaf
--- /dev/null
+++ b/content/notes/2023-09-18-aws-eb-pyyaml-fix.md
@@ -0,0 +1,35 @@
+---
+title: "AWS EB PyYAML fix"
+url: /aws-eb-pyyaml-fix.html
+date: 2023-09-18T07:27:29+02:00
+type: note
+draft: false
+---
+
+Recent update of my system completely borked [EB CLI](https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/eb-cli3-install-advanced.html)
+on my machine.
+
+I tried installing it with `pip install awsebcli --upgrade --user` and it failed.
+
+The error was the following.
+
+```text
+Collecting PyYAML<6.1,>=5.3.1 (from awsebcli)
+  Using cached PyYAML-5.4.1.tar.gz (175 kB)
+  Installing build dependencies ... done
+  Getting requirements to build wheel ... error
+  error: subprocess-exited-with-error
+  
+  × Getting requirements to build wheel did not run successfully.
+  │ exit code: 1
+  ╰─> [68 lines of output]
+```
+
+To fix this issue with PyYAML you must install PyYAML separately.
+
+Do the following and try installing `eb` again after.
+
+```sh
+echo 'Cython < 3.0' > /tmp/constraint.txt
+PIP_CONSTRAINT=/tmp/constraint.txt pip install 'PyYAML==5.4.1'
+```
diff --git a/content/notes/2023-09-25-compile-drawterm-on-fedora-38.md b/content/notes/2023-09-25-compile-drawterm-on-fedora-38.md
new file mode 100644
index 0000000..a369c66
--- /dev/null
+++ b/content/notes/2023-09-25-compile-drawterm-on-fedora-38.md
@@ -0,0 +1,23 @@
+---
+title: "Compile drawterm on Fedora 38"
+url: /compile-drawterm-on-fedora-38.html
+date: 2023-09-25T09:04:28+02:00
+type: note
+draft: false
+---
+
+First install two dependencies:
+
+```sh
+sudo dnf install libX11-devel libXt-devel
+```
+
+Clone the repo and compile it:
+
+```sh
+git clone git://git.9front.org/plan9front/drawterm
+cd drawterm
+CONF=unix make
+```
+
+That should produce `drawterm` binary.
diff --git a/content/notes/2023-11-04-using-ffmpeg-to-combine-video-side-by-side.md b/content/notes/2023-11-04-using-ffmpeg-to-combine-video-side-by-side.md
new file mode 100644
index 0000000..294f77b
--- /dev/null
+++ b/content/notes/2023-11-04-using-ffmpeg-to-combine-video-side-by-side.md
@@ -0,0 +1,40 @@
+---
+title: "Using ffmpeg to combine videos side by side"
+url: /using-ffmpeg-to-combine-video-side-by-side.html
+date: 2023-11-04T09:04:28+02:00
+type: note
+draft: false
+---
+
+I had a 4 webm videos (each 492x451) that I wanted to combine to be played side
+by side and I tried [iMovie](https://support.apple.com/imovie) and
+[Kdenlive](https://kdenlive.org/) and failed to do it in an easy way. I needed
+this for Github readme file so it also needed to be a GIF.
+
+The following is the [ffmpeg](https://ffmpeg.org/) version of it.
+
+```sh
+ffmpeg -y \
+  -i 01.webm \
+  -i 02.webm \
+  -i 03.webm \
+  -i 04.webm \
+  -filter_complex "\
+        [0:v] trim=duration=8, setpts=PTS-STARTPTS, scale=492x451, fps=6 [a0]; \
+        [1:v] trim=duration=8, setpts=PTS-STARTPTS, scale=492x451, fps=6 [a1]; \
+        [2:v] trim=duration=8, setpts=PTS-STARTPTS, scale=492x451, fps=6 [a2]; \
+        [3:v] trim=duration=8, setpts=PTS-STARTPTS, scale=492x451, fps=6 [a3]; \
+        [a0][a1][a2][a3] xstack=inputs=4:layout=0_0|w0_0|w0+w1_0|w0+w1+w2_0, scale=1000:-1 [v]" \
+  -map "[v]" \
+  -crf 23 \
+  -preset veryfast \
+  trigraphs.gif
+```
+
+- This will produce `trigraphs.gif` that is also scaled to max 1000px in width
+  (refer to `scale=1000:-1`).
+- The important part for 4x1 stack is `xstack=inputs=4:layout=0_0|w0_0|w0+w1_0|w0+w1+w2_0`.
+- This will also cap frame rate to 6 (refer to `fps=6`) since that is enough and
+  this makes playback of GIFs smoother in a browser.
+
+![Result](./assets/notes/trigraphs.gif)
diff --git a/content/notes/2023-11-05-add-lazy-loading-to-jekyll-posts.md b/content/notes/2023-11-05-add-lazy-loading-to-jekyll-posts.md
new file mode 100644
index 0000000..5d6dae4
--- /dev/null
+++ b/content/notes/2023-11-05-add-lazy-loading-to-jekyll-posts.md
@@ -0,0 +1,33 @@
+---
+title: "Add lazy loading of images in Jekyll posts"
+url: /add-lazy-loading-to-jekyll-posts.html
+date: 2023-11-05T09:04:28+02:00
+type: note
+draft: false
+---
+
+Normally you define images with `![]()` in markdown files. But jekyll also
+provides a way to adding custom attributes to tags with `{:attr="value"}`.
+
+If you have lots of posts this command will append `` to all
+images in all your markdown files.
+
+```md
+![image-title](/path/to/your/image.jpg)
+```
+
+will become
+
+```md
+![image-title](/path/to/your/image.jpg)
+```
+
+Shell line bellow. Go into the folder where your posts are (probably `_posts`).
+
+```sh
+find . -type f -name "*.md" -exec sed -i -E 's/(\!\[.*\]\((.*?)\))$/\1/' {} \;
+```
+
+Under the hood this adds `loading="lazy"` to HTML `img` nodes.
+
+That is about it.
diff --git a/content/notes/2023-11-07-personal-sane-vim-defaults.md b/content/notes/2023-11-07-personal-sane-vim-defaults.md
new file mode 100644
index 0000000..a9157ad
--- /dev/null
+++ b/content/notes/2023-11-07-personal-sane-vim-defaults.md
@@ -0,0 +1,59 @@
+---
+title: "Personal sane Vim defaults"
+url: /apersonal-sane-vim-defaults.html
+date: 2023-11-07T01:04:28+02:00
+type: note
+draft: false
+---
+
+I have found many "sane" default configs on the net and this is my favorite
+personal list. This is how my `.vimrc` file looks like.
+
+```vimrc
+" General sane defaults.
+syntax enable
+colorscheme sorbet
+nnoremap q: <nop>
+set nocompatible
+set relativenumber
+set nohlsearch
+set smartcase
+set ignorecase
+set incsearch
+set autoindent
+set nowrap
+set nobackup
+set noswapfile
+set autoread
+set wildmenu
+set encoding=utf8
+set backspace=2
+set scrolloff=4
+set spelllang=en_us
+
+" Status Line enhancements.
+set laststatus=2
+set statusline=%f%m%=%y\ %{strlen(&fenc)?&fenc:'none'}\ %l:%c\ %L\ %P
+hi StatusLine cterm=NONE ctermbg=black ctermfg=brown
+hi StatusLineNC cterm=NONE ctermbg=black ctermfg=darkgray
+
+" Commenting blocks of code.
+augroup commenting_blocks_of_code
+  autocmd!
+  autocmd FileType c,cpp,go,scala   let b:comment_leader = '// '
+  autocmd FileType sh,ruby,python   let b:comment_leader = '# '
+  autocmd FileType conf,fstab       let b:comment_leader = '# '
+  autocmd FileType lua              let b:comment_leader = '-- '
+  autocmd FileType vim              let b:comment_leader = '" '
+augroup END
+noremap <silent> ,cc :<C-B>silent <C-E>s/^/<C-R>=escape(b:comment_leader,'\/')<CR>/<CR>:nohlsearch<CR>
+noremap <silent> ,cu :<C-B>silent <C-E>s/^\V<C-R>=escape(b:comment_leader,'\/')<CR>//e<CR>:nohlsearch<CR>
+
+" Language specific indentation.
+filetype plugin indent on
+autocmd Filetype make,go,c,cpp setlocal noexpandtab tabstop=4 shiftwidth=4
+autocmd Filetype html,js,css setlocal expandtab tabstop=2 shiftwidth=2
+```
+
+I keep it pretty vanilla so this is about everything I have in the file.
+
diff --git a/content/notes/2024-02-15-extract-lines-from-file.md b/content/notes/2024-02-15-extract-lines-from-file.md
new file mode 100644
index 0000000..09d3937
--- /dev/null
+++ b/content/notes/2024-02-15-extract-lines-from-file.md
@@ -0,0 +1,19 @@
+---
+title: "Extract lines from a file with sed"
+url: /extract-lines-from-file-with-sed.html
+date: 2024-02-15T10:04:28+02:00
+type: note
+draft: false
+---
+
+Easy way to extract line ranges (from line 200 to line 210) with sed.
+
+```sh
+sed -n '200,210p' data/Homo_sapiens.GRCh38.dna.chromosome.18.fa
+
+# then pipe it to a new file with
+
+sed -n '200,210p' data/Homo_sapiens.GRCh38.dna.chromosome.18.fa > new.fa
+```
+
+`head` or `tail` could be used to extract from begining of the end of the file.
diff --git a/content/notes/2024-02-21-dcss-online-rc-defaults.md b/content/notes/2024-02-21-dcss-online-rc-defaults.md
new file mode 100644
index 0000000..5085b1c
--- /dev/null
+++ b/content/notes/2024-02-21-dcss-online-rc-defaults.md
@@ -0,0 +1,33 @@
+---
+title: "Sane default for Dungeon Crawl Stone Soup Online edition"
+url: /dcss-online-rc-defaults.html
+date: 2024-02-21T06:35:11+02:00
+type: note
+draft: false
+---
+
+I mostly play Dungeon Crawl Stone Soup online on Ohio, USA: cbro.berotato.org server and
+when you start playing you can select the version you want to play. Each instance also
+has `rc` file that can customize the way the game behave.
+
+This is my sane defaults config. It zooms in the game without needing to zoom in the
+browser and it also adds a bit of delays in exploring and it stops at fight.
+
+```ini
+autofight_stop = 80
+explore_auto_rest = true
+explore_delay = 20
+
+tile_cell_pixels = 48
+tile_font_crt_size = 24
+tile_font_stat_size = 24
+tile_font_msg_size = 24
+tile_font_tip_size = 24
+tile_font_lbl_size = 24
+tile_map_pixels = 0
+tile_filter_scaling = false
+```
+
+All the possible options are documented in the [Dungeon Crawl Stone Soup Options
+Guide](https://github.com/crawl/crawl/blob/master/crawl-ref/docs/options_guide.txt)
+file.
diff --git a/content/notes/2024-02-23-uninstall-ollama-from-a-linux-box.md b/content/notes/2024-02-23-uninstall-ollama-from-a-linux-box.md
new file mode 100644
index 0000000..a597c54
--- /dev/null
+++ b/content/notes/2024-02-23-uninstall-ollama-from-a-linux-box.md
@@ -0,0 +1,25 @@
+---
+title: Uninstall Ollama from a Linux box
+url: /uninstall-ollama-from-a-linux-box.html
+type: note
+date: 2024-02-23
+draft: false
+---
+I have had some issues with Ollama not being up-to-date. If Ollama is installed with a curl command, it adds a systemd service.
+
+```sh
+sudo systemctl stop ollama
+sudo systemctl disable ollama
+sudo rm /etc/systemd/system/ollama.service
+sudo systemctl daemon-reload
+
+sudo rm /usr/local/bin/ollama
+
+sudo userdel ollama
+sudo groupdel ollama
+
+rm -r ~/.ollama
+sudo rm -rf /usr/share/ollama
+```
+
+That is about it.