i goto system - preferences - hardware - keyboard shortcuts
There is no copy and paste command for me to map a button to so i click the add button. It asks me for name and command. I want to copy so i put copy as command but and try to map a key to it and try using the key to copy something which doesnt seem to work.
I guess that is not the correct command for copy. what are the commands for copy, cut and paste? anyone know?
In most applications Cut, Copy and Paste are Ctrl + X, Ctrl + C and Ctrl+V respectively.
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The Keyboard Shortcuts
program is at the system level. Editing commands are application defined so there is no “system” or external command that executes a cut, copy, paste.
Maybe a developer can answer but I think there’s a spec or standard that defines those keys @mdooley mentions that’s been around so long, and they come with every library programmers use, everyone’s forgotten about it. 
You can install xdotool and emulate keyboard input.
sudo apt install xdotool -y
The commands you want to run for copy, paste and cut are then:
Copy
xdotool key --clearmodifiers ctrl+c
Paste
xdotool key --clearmodifiers ctrl+v
Cut
xdotool key --clearmodifiers ctrl+x
silly question - did you use “copy” or “cp” ?
(am I getting the question, even?)