Numpad hotkeys on linux

Making numpad hotkeys on linux is a bit more tricky than it is on windows due to the critical lack of autohotkey

keyd is an excellent way to make hotkeys:

You can force X11 to ignore specific keyboards by adding a file to /etc/X11/xorg.conf.d/22-ignorethisdevice.conf:

Section "InputClass"

   Identifier "DisableGearHeadNumpad"         
   MatchIsKeyboard "on"
   MatchUSBID "04d9:1503"
   Option "Ignore" "true"

EndSection

I've created a script to handle keys pressed by a specific numpad:

1. !/bin/bash

keyd monitor | while

read;
do
if echo "$REPLY" | fgrep "04d9:1503:20f521c9"; then
 if echo "$REPLY" | fgrep "kp0 down"; then echo "this is button 0"; 
 fi
 if echo "$REPLY" | fgrep "kp1 down"; then echo "this is button 1"; 
 fi
 if echo "$REPLY" | fgrep "kp2 down"; then echo "this is button 2"; 
 fi
 if echo "$REPLY" | fgrep "kp3 down"; then echo "this is button 3"; 
 fi
 if echo "$REPLY" | fgrep "kp4 down"; then echo "this is button 4"; 
 fi
 if echo "$REPLY" | fgrep "kp5 down"; then echo "this is button 5"; 
 fi
 if echo "$REPLY" | fgrep "kp6 down"; then echo "this is button 6"; 
 fi
 if echo "$REPLY" | fgrep "kp7 down"; then echo "this is button 7"; 
 fi
 if echo "$REPLY" | fgrep "kp8 down"; then echo "this is button 8"; 
 fi
 if echo "$REPLY" | fgrep "kp9 down"; then echo "this is button 9"; 
 fi
 if echo "$REPLY" | fgrep "numlock down"; then echo "this is button numlock";
      ~/sh/rmctrl/commands/lightoff     
 fi
 if echo "$REPLY" | fgrep "kpslash down"; then echo "this is button /";
      ~/sh/rmctrl/commands/lighton      
 fi
 if echo "$REPLY" | fgrep "kpasterisk down"; then echo "this is button *";
      ~/sh/rmctrl/commands/monitoroff   
 fi
 if echo "$REPLY" | fgrep "backspace down"; then echo "this is button backspace";
      ~/sh/rmctrl/commands/monitoron    
 fi
fi

done

You could also xmodmap, but it has issues with hotplugging. You can use it like this:

xmodmap -e 'keycode 90 = Hyper_R'

You can use XCape to allow the modifier keys to send actions on their own.

sudo apt install xcape xcape -e 'Hyper_R=0'

I've started work on porting my numpad hotkey script to python so it can work on linux: clipboardbuffers.py