Swaps "Caps Lock" and "Left Ctrl" in Ubuntu

capslock_lctrl_remap.sh

#!/bin/sh

# Script to remap the "Caps Lock" and "Left Ctrl" keys
# The change persists between sessions
#
# Caps Lock -> Left Ctrl
# Left Ctrl  -> Caps Lock
#
# Make it executable and run it:
# chmod +x capslock_lctrl_remap.sh
# ./capslock_lctrl_remap.sh

if [ $# = 1 ] && [ "$1" = "-h" ]; then
	echo "Arguments:"
	echo "-h\thelp"
	echo "-l\tlogout"
	exit 0
fi

# Remapping
cd /usr/share/X11/xkb/symbols/
sudo sed -i -e "/key <CAPS>/ s/Caps_Lock/Control_L/g" -e "/key <LCTL>/ s/Control_L/Caps_Lock/g" pc

# Enforces keyboard layouts recompilation
cd /var/lib/xkb/
sudo rm *

# Logout: Save any open files
if [ "$1" = "-l" ]; then
	echo "Logging out"
	kill -9 -1
fi