How to program a Koolertron macropad?

I bought [this macropad](https://www.amazon.com/Koolertron-Single-Handed-Programmable-Mechanical-Keyboard/dp/B076LRJ528/ref=asc_df_B076LRJ528/?tag=hyprod-20&linkCode=df0&hvadid=312181276443&hvpos=&hvnetw=g&hvrand=4333784923832821142&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9003619&hvtargid=pla-571192155057&psc=1) awhile ago but I haven't been able to figure out how to program it. Right now it types keys like a normal keyboard but I want to beable to run commands when I press the buttons. What would be the best way to make that happen? Edit: forgot to mention that I'm using Manjaro