Ubuntu 18.04 - Swap Caps lock and Ctrl

Ubuntu 18.04, Swap Caps lock and Ctrl - No installation

1. Open ~/.Xmodmap

   gedit ~/.Xmodmap

   Contenst of the ~/.Xmodmap:

   keycode 37 = Caps_Lock NoSymbol Caps_Lock
   keycode 66 = Control_L NoSymbol Control_L

2. Modify:

   keycode 66 = Caps_Lock NoSymbol Caps_Lock
   keycode 37 = Control_L NoSymbol Control_L

3. Save the file and apply config

   xmodmap ~/.Xmodmap