As a tip from someone who also used to host game servers on Linux mint (and now Ubuntu server), you will save yourself so many headaches if you use an open-source container program like Pterodactyl Panel. Even if a game isn't officially supported (like 7 days to die), someone's already made a community script for the game that can be imported in 4 or so clicks.

Trust me, it's a hell of a lot better than the manual option on Windows or Linux for games XD