This is the public issue tracker, info- and helpdesk and update location of Cultures: Northland (Linux version). You can find a non-Cultures:-Northland-specific helpdesk here.
Latest update for the Linux version of Cultures: Northland CDROM retail version: Downloads
Desura users will get the updates via the Desura client and as an updated standalone installer as soon as the game is released on Desura.
You can find it here.
Command line switches
You can find them here.