i wrote a little thing on setting it up a while back:
http://archicad-talk.graphisoft.com/viewtopic.php?t=9187
I have had it running on a few redhat versions, fedora, ubuntu, and gentoo without problems. It is very easy to use, even if you aren't familiar with linux.
Josh Osborne - Central Innovation
HP Zbook Studio G4 - Windows 10 Pro, Intel i7 7820HQ, 32Gb RAM, Quadro M1200