Now, Linux works. Next step : make JKA working (with OpenJK linux). How to open the console ? The small 2 (azerty) doesn't work. And where is located the openjk.cfg ???
Good luck with that. The CFG is most likely in ~(your home folder)/.local/share/openjk/base/ (hidden by default, but you can set hidden items to visible in the explorer).
In fact all of your personal settings on the computer are conveniently stored in your home folder in Linux. So if you backed up your home folder, you would back up both your personal files and documents and all your app settings in one go. Most of the app settings are in .local/share.