If you are an Emacs user then you will definitely understand the importance of control key. So, emacs user usually shift their ctrl to some different key for the sake of saving their little finger. In my case i swapped my ctrl and caps keys. Open the /etc/X11/xorg.conf file and add the following line in the Section "InputDevice" Option "XkbOptions" "ctrl:swapcaps" Now your caps is ctrl and ctrl is caps.