N1MM+ has been the go-to contest logger for many hams and, thanks to its networking features, also clubs. Sadly, it's only for Windows, it's closed-source and the omnipresent bugs don't make it any more fun.
- Install any decently recent flavour of Wine. Usually the one provided by your distro's package manager is fine.
- Install winetricks.
- Set the required environment variables. You only need to specify
$WINEARCH
once, when creating the wineprefix (which is, in short, a self-contained "fake" "Windows" "installation"). When you'll want to work inside this prefix, you'll need to run the first command inside every newly opened terminal window.