GNU/Linux Command – SHOWKEY

showkey — Examine the codes sent by the keyboard
 
Summary :
showkey prints to standard output either the scan codes or the keycode or the `ascii’ code of each key pressed. It can be used to check the keyboard driver and key mappings.
 
Example:
$ showkey -- Show the interpreted keycode.  $ showkey -k -- Same as above (Default Option).  $ showkey -s -- Show the raw scan-codes of the keys.  $ showkey -a -- Show the Decimal/Octal/Hex values of the keys.
Note: If Showkey is in keycode/scancode mode, then you have to wait 10 Sec to exit. In Ascii mode, Press Ctrl+D to exit.
 
Read: man showkey

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