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Some keys in my keyboard came to a sticky end after a catastrophic coke spill. I do not intend to replace the old keyboard, since the whole laptop will be replaced next year.

The keys in question are: arrow up, arrow down, shift and '/'.

Shift has a twin brother on the west coast, who's doing all the work now, and I could rewire '/' as 'delete' (now I realize this was a totally useless key) with the xmodmap -e 'keycode 119=/' command. That is, pressing 'delete' outputs a '/' now.

To discover how to replace the keys I use xev. I intend to replace arrow-up and arrow-down for pgup and pgdn respectively. Unhappily arrow-up/down do not have output. I know that pgup and pgdn are keycodes 112 and keycodes 117. But what should I fill in in the xmodmap -e 'keycode <value>=<action>' pattern asxmodmap -e 'keycode 112=' and xmodmap -e 'keycode 117='

  • Assuming you are talking about the keyboard of the laptop itself, a quick and simple solution till the replacement of your laptop could be a cheap USB keyboard. – Crovaxon Dec 27 '18 at 8:42
  • While Stephen Kitt's will work, if there is any way you can, I suggest fixing, replacing, or circumventing (USB keyboard) the keyboard. The $50 saved is not worth the effort of retraining your self to type incorrectly, then to have to re-train yourself to type properly again. – coteyr Dec 27 '18 at 10:23
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See /usr/include/X11/keysymdef.h for the available key names:

xmodmap -e 'keycode 112=Up'
xmodmap -e 'keycode 117=Down'

(the prefixes need to be removed).

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