 Doom is fast as possible on Debian Linux, sudo apt install prboom plus doom wad shareware once downloaded type doom to play you're now playing doom this is the shareware version that doesn't have all the levels to play the version with all the levels you'll need the doom iwad we will sudo w get the url to the iwad output to user share games doom doom wad once downloaded type in doom to play the ultimate doom with all four episodes once in here you'll probably want to go into options general settings change the video mode resolution and make it full screen that's it you're playing doom on linux have a great day