How do I check which key is pressed?

Question

On my keyboard-layout the left Ctrl key is not working (the right works normal).

How can I check if another key is ordered to that key?

I once had a commandline tool that i could start and there it showed me every input that came whatever key I pressed, but I cannot find it anymore.

If I find out, that it works, I want to remap the correct key to my left Ctrl key

score 28 · Accepted Answer · answered Jan 27 '14 at 10:10

Would that be xev?

Here's a command for simplified output:

xev | grep -A2 --line-buffered '^KeyRelease' | sed -n '/keycode /s/^.*keycode \([0-9]*\).* (.*, \(.*\)).*$/\1 \2/p'

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