Special characters (Linux)

I use the right Alt key as compose key. It seems that there are key combinations up to three keys long.

Letters

Letter	Combination	Code & name	Notes
ć	?	U0107 - Latin small letter C with acute	According to [1], these would be valid combinations, but they don't seem to work: ' c - Apostrophe c c ' - c apostrophe acute c
č	c c < c
ğ	g (		First the letter, than the symbol
ı	. i		Turkish dotless i
ň	n <		"ˇ": Caron [2]

Symbols

Symbol	Name or code	Combination	Notes
→		- >
½		1 2
·		. ^	Dot in the middle "^": asciicircum or accent circumflex
°		0 0 or 0 *	Degree

Case: How to write ć (2023.05)

Writing "ć" the suggested way (e.g., apostrophe c or acute c) doesn't seem to work. Let's try suggestion from [https://askubuntu.com/questions/906390/how-to-get-letter-%C4%87-with-the-dead-keys:

1. sudo dpkg-reconfigure keyboard-configuration
2. Set keyboard to US keyboards without dead keys
3. Restart the computer.

My keyboard:

• There are 109 keys (including numeric keyboards, without on/off and audio keys)
• Dell Latitude laptop
• Originally a French keyboard, but with stickers to make it look like what seems to be a normal US keyboard.

Trial 1

Keyboard configuration goes in stages:

1. Dell Latitude laptop
2. English (US) - It's actually a French keyboard with stickers, but let's try to ignore that
3. English (US) - English (US, euron on 5) - I can't see if there is a euro at 5, due to a sticker, but they usually have, don't they?
4. AltGr key: Right Alt (AltGr)
5. Compose key: Right Alt (AltGr)
6. Use Control-Alt-Backspace to terminate X server.

Trial 2

Keyboard settings:

1. Dell Latitude laptop
2. French
3. French - French (alt., no dead keys)
4. AltGr key: Right Alt (AltGr)
5. Compose key: Right Alt (AltGr)
6. Use Control-Alt-Backspace to terminate X server.

Results: I now had an Azerty keyboard, and I couldn't log in without the Onscreen keyboard → I haven an English keyboard

Trial 3

English → English (without anything else) → Same problem as before.

Trial 4

• English
• English (US) - English (intl., with AltGr dead keys)

Change X11 Compose file

• Based on https://askubuntu.com/questions/1257998/type-c-acute-%c4%86-%c4%87-on-ubuntu-mate-20-04-lts?rq=1, I've changed something somewhere
• Didn't help. Maybe I should really understand what I'm doing
• I changed stuff back
• Here: /usr/share/X11/locale/en_US.UTF-8/Compose

Create a .XCompose file

https://askubuntu.com/questions/47496/how-can-i-add-a-custom-compose-key-sequence/71335#71335 - Still to come.

Sources

• https://www.reddit.com/r/linux/comments/7n7pk/how_do_i_type_the_infinity_symbol_on_linux_on/
• https://cgit.freedesktop.org/xorg/lib/libX11/plain/nls/en_US.UTF-8/Compose.pre - Waarschijnlijk de complete lijst!

Trouble with ć

• https://askubuntu.com/questions/906390/how-to-get-letter-%C4%87-with-the-dead-keys - Didn't work for me
• https://askubuntu.com/questions/1257998/type-c-acute-%c4%86-%c4%87-on-ubuntu-mate-20-04-lts?rq=1