Installed on Ubuntu using forced proton mode (experimental) to get Windows version so i can use parallax mod. Initially game didnt lauch due to the launcher but thanks to mr. Anticitizen the command worked nicely "eval $( echo "%command%" | sed "s/PDLauncher/LauncherPatcher.exe'.*/KSP_x64.exe'/" )". And to fix framerate you need to change ingame graphics setting "Texture quality" to "half Res", set everything else to max and it still looks gorgeous. Good luck!