How to use RGB keyboard on linux?

Solution 1:

Open the terminal, this can be done via the applications UI in the bottom left. ctrl+T might also work.

Then you will want to type in: man xset

This is the manual for xset. If you are new this sort of thing it might come over as intimidating, but don't worry.

If you scroll down a little you will find there to be a tab for 'led'. Read it. .......... You done? Great!

To return to the command line press: q

Okay, so in your case the command 'xset led' should work, try it!