Compose keys in Linux

Show all keys

Show all able compose keys with command.

cat "/usr/share/X11/locale/$(grep --max-count=1 "${LANG%.*}.UTF-8\$" /usr/share/X11/locale/locale.dir | cut --delimiter=/ --fields 1)/Compose"

⫰

Math

keys	Result
o o	°
o A	Å
> =	≥
< =	≤
x x	×
> >	»
< <	«»

Direction

keys	Result
< -	←
| ^	↑
| v	↓

Others

keys	Result
o c	©
o r	®
= Y	¥
= E	€

Meme

keys	Result
< 3	♥

Customize Compouse key

In default profile, the Greek alphabet is like <dead_greek> <a>. But normally, we do not have this thing in our keyboard.

As a result, I changed it to g+g+a

This is how I change all <dead_greek>

sudo cp /usr/share/X11/locale/en_US.UTF-8/Compose /usr/share/X11/locale/en_US.UTF-8/Compose_bk
sudo sed -i 's/<dead_greek>/<Multi_key> <g> <g>/' /usr/share/X11/locale/en_US.UTF-8/Compose

sudo reboot
```  



## Costumize Compose Key

```bash
sudo vim /usr/share/X11/locale/en_US.UTF-8/Compose

<Multi_key> <bar> <asciicircum>                     : "↑"
<Multi_key> <asciicircum> <bar>                     : "↑"
<Multi_key> <bar> <v>                     : "↓"
<Multi_key> <bar> <V>                     : "↓"
<Multi_key> <v> <bar>                     : "↓"
<Multi_key> <V> <bar>                     : "↓"
<Multi_key> <asciitilde> <equal>          : "≈"

Reboot/Relogo to reload