Caps Lock to RIGHT Control (It is important to be the right one)

Question

I have found a lot of ways to map Caps Lock to Left Control. For example: editing /etc/default/keyboard and adding "ctrl:nocaps" to the XKBOPTIONS

But I can't find anywhere how to map to Right Control, I need it to be the right because I am trying to do something after that and being the right is necessary for the next step

How can I map Caps Lock to Right Control?

Answer 1

Use

xev

And press the key Right Control. You will get an event like this:

KeyPress event, serial 36, synthetic NO, window 0x4200001,
root 0x266, subw 0x0, time 253995826, (1344,552), root:(1410,604),
state 0x10, keycode 105 (keysym 0xffe4, Control_R), same_screen YES,
XLookupString gives 0 bytes: 
XmbLookupString gives 0 bytes: 
XFilterEvent returns: False

Remember the keycode, in my case 105.

Create a script, for example /home/user/xmodmap.sh with the following:

#!/bin/bash
xmodmap -e "keycode 105 = Caps_Lock"

Now give permissions to the script with:

sudo chmod 755 /home/user/xmodmap.sh

And add it to be run when your Ubuntu starts going to System -> Preferences -> Startup Applications and creating a new entry with the command:

/bin/bash -c "sleep 5 && /home/user/xmodmap.sh"