Just posting some pretty good doc's on securing *nix systems... these are done by AUSCERT... I recommend new users to *nix based systems to take a look at these, especially if they want to setup *nix boxes on the net...

It covers most systems: Irix, SunOS, Solaris, HPUX, AIX, BSD/OS, FreeBSD, NetBSD, OpenBSD, Linux, etc...

Unix Security Checklist v2.0 (Full Version):

Unix Security Checklist v2.0 (Just The Essentialls):

If you already know this stuff, then please ignore this post. This is for those who don't.

God Bless