Inspired by Lennart Borgman’s recent post on help.gnu.emacs about binding Caps Lock to M-x on Microsoft Windows, I set my system up with the Linux equivalent.

To make Caps Lock a shortcut for M-x, add the following lines to your ~/.emacs:

(if (eq window-system 'x)
    (shell-command "xmodmap -e 'clear Lock' -e 'keycode 66 = F13'"))
(global-set-key [f13] 'execute-extended-command)