xmodmap

Utility for modifying keymaps and pointer button mappings in X. More information: https://manned.org/xmodmap.

• Swap left-click and right-click on the pointer:

xmodmap -e 'pointer = 3 2 1'

• Reassign a key on the keyboard to another key:

xmodmap -e 'keycode {{keycode}} = {{keyname}}

• Disable a key on the keyboard:

xmodmap -e 'keycode {{keycode}} ='

• Execute all xmodmap expressions in the specified file:

xmodmap {{path/to/file}}