I have attempted to install FGS on Ubuntu 10.4 using "sudo sh fgs-mapserver_basic_5.6.3-fgs_9.5-linux-i386.bin." The installation stops because FGS cannot set up new users. I found that if I create a regular postgis user, and administrative apache user, then I have no issues installing FGS. However, I don't think it would be a wise decision to have an administrative apache account on a live system.
Does anyone have any better installation steps for Ubuntu?