Hi,
Yeah, the Linux version sure needs a readme, but I have not had the time to try it out on linux unfortunately. And I have no experience with Linux, so I need to find someone who can help me with that.
The application is built as a deamon/service, and in Windows, it writes information and warnings to the event viewer. I think the equivalent in linux might be "syslogd", so take a look there.
Try running it with "./FactorioLeaderboardService console" or if you want to enter all the config parameters:
./FactorioLeaderboardService console apikey=######YOUR-API-KEY-##### factorioDirectory="path to factorio folder/Factorio" runAfterConfigChange
Best regards,
The Development Team
FactorioLeaderboard.com