I would like to address the previous comments.
First, I don't think there is a "testing" or "support" question for the Quartus Web Edition:
The fact that the software is offered freely imply that there are no official support other than the forums, and no guaranties.
If one want these, the paying version is here for that.
(And it's not like the software was windows-only, it *already* runs undere linux....)
Concerning the distributions, SUSE 9 can be freely downloaded (not the enterprise version, but the distribution is 100% compatible),
Concerning RHEL which is a commercial version, CENTOS is fully compatible with it (with no technical support other than forums of course). I use it daily to test packages going to be installed on a RHEL afterward.
If people needs to install on other version, like Debian or Ubuntu, it's now possible thanks to the recents enhancements of the binary compatibility between distributions : A simple script would be needed to convert the RPM package in another format.
For now, I'm also starting in the FPGA domain, and if my heart goes toward Altera's chips, I've been holding my investment until a linux version of the Quartus Web Edition comes out.