System-wide data and configuration files.
Console keymap file with Caps Lock remapped to Escape. Place in /usr/local/share/kbd/keymaps/ and set LANG=/usr/local/share/kbd/keymaps/uk-esc.map (usually in /etc/vconsole.conf).
X11 keyboard configuration with Caps Lock remapped to Escape, Euro sign on AltGr+4 and Ctrl+Alt+Backspace. Place in /etc/X11/xorg.conf.d/.
Message of the Day file containing notification of system-wide keyboard remaps. Place in /etc/ to display after users log in.