keyboard

Set Layout with X Display

Set layout to British English.

1setxkbmap -layout gb

Or Polish with:

1setxkbmap -layout pl

Language	short
Polish	pl
Serbian	rs

Set 'alt + shift', as the command which cycles through the British English, Polish and Serbian keyboard layout.

1setxkbmap -layout gb,pl,rs -option grp:alt_shift_toggle

Alt_GR

Remap, e.g., the right Windows key, to Alt_Gr.

1    key <RWIN> {[  ISO_Level3_Shift    ]};

Set TTY Keymap

Copy your keymap, e.g. if it's polish-1, then:

1cp /usr/share/kbd/keymaps/i386/qwerty/pl1.map.gz /usr/share/kbd/keymaps/*custom*.map.gz

Then change that map:

1sudo vim /usr/share/kbd/keymaps/custom.map.gz

You can switch Escape and Caps Lock with a single line:

1sudo sh -c "gunzip -c /usr/share/kbd/keymaps/i386/qwerty/pl1.map.gz   | sed 's/ Escape/ PLACEHOLDER/ ; s/Caps_Lock/Escape/g ; s/PLACEHOLDER/Caps_Lock/' | gzip > /usr/share/kbd/keymaps/custom.map.gz"

Change the default keyboard mapping to the custom map:

1echo 'KEYMAP="/usr/share/kbd/keymaps/*custom*.map.gz"'  | sudo tee /etc/vconsole.conf

Reboot to have changes take effect.