My HP ZBook has a keyboard issue (colleague has the same model, same issue after ~2 years, seems really poor quality). It is that the left shift key is failing. So as a work around I would like to use the caps lock key as a replacement, for the left shift key. I'm using Debian Stretch with GNOME 3.

I looked through Tweak Tool, "Caps Lock toggles ShiftLock" is mostly what I want, but I don't want to toggle the state, but only hold shift as long as I hold the caps lock key. How can I map the caps lock key to behave exactly like the left shift key?

I can run xev to find the key code of caps lock (66), but obviously it doesn't emit anything for the broken shift key.


So I found a related question over at superuser. Running xev gives me keycode 66 for caps lock, and then this works:

xmodmap -e 'keycode 66 = shift_L'

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