This will be/is a sticky for *nix newbies. Let me state several facts before proceeding:
This is NOT an all inclusive list; this is a *start*, a beginning if you will to put you on the path of good and righteousness.
Did I neglect to mention several (hundred) linux distros? Yes, I did. If you are a Linux person and are wildly upset because I missed your favorite distro, I have but one question; why are you reading a FAQ for newbies?
Regardless, there is not enough space to mention every single version of every single OS type -- suffice to say that the big ones have been covered.
Did I cover every single application for *nix? No. There is not enough space on BWM's SQL db to contain that many links.

Ask away, if you need specific help, and who knows ... it might just find it's way into this document.
What I attempted to do was convey a basic understanding of the medium; a 'primer' of sorts.
I will no doubt be adding links as they hit me -- this is just a few of the ones I have in my browser bookmarks which I thought you might find useful.
Cheers, and good luck.
Linux::
Generic:
Linux Online (where to go first)
http://www.linux.org/
Where to get your ISO (this is your second stop)
http://www.linuxiso.org/
Source for RPMs
http://www.rpm.org/
Linux install how-to
http://mirrors.kernel.org/LDP/HOWTO/Installation-HOWTO
SUSE/SLES:
Online Manual (pdf)
http://www.novell.com/documentation/suse93/index.html
SuSe FAQ
http://susefaq.sourceforge.net/faq/suseconfig.html
RH/Fedora/RHEL:
Security Quick-Start for RH
http://www.tldp.org/HOWTO/Security-Quic ... hat-HOWTO/
Pocket ISP (or How to Start an ISP with RH)
http://www.faqs.org/docs/Linux-HOWTO/IS ... HOWTO.html
How to build secure pache
http://ldp.rtin.bz/HOWTO/SSL-RedHat-HOWTO.html
Red Hat Kick start
http://wwwcache.ja.net/dev/kickstart/Ki ... HOWTO.html
LiveCD:
Knoppix:
Knoppix Itself
http://www.knoppix.org/
Gentoo:
Handbook
http://www.gentoo.org/doc/en/handbook/index.xml
Installation
http://www.linux.org/news/2004/09/11/0008.html
Portage updates
http://www.gentoo-portage.com/
Unix::
BSD:
FreeBSD:
THE BSD itself
http://www.freebsd.org
Desktop Version
http://www.pcbsd.org
Tips/Tricks
http://www.freebsddiary.org/
Entire FreeBSD Handbook
http://www.freebsd.org/doc/en_US.ISO885 ... /handbook/
FreeBSD CheatSheets (Warning not updated in some time)
http://www.mostgraveconcern.com/freebsd/
Port Updates
http://www.freshports.org
OpenBSD:
OpenBSD
http://www.openbsd.org
Open BSD install guide
http://www.openbsd.org/faq/faq4.html
FreeBSD CheatSheets (Warning not updated in some time)
http://www.mostgraveconcern.com/freebsd/
LiveCD:
http://www.freesbie.org
SysV:
Solaris (though Solaris is becoming more BSD-ish as of late):
Security Publications
http://www.sun.com/software/security/blueprints/
How-To (warning: google translated from German, since I am not sure how many of you speak Deutch
http://translate.google.com/translate?u ... uage_tools
Hints
http://www.bolthole.com/solaris/
SunSolve, the place for patches
http://sunsolve.sun.com/pub-cgi/show.pl?target=home
AIX:
Great resource for all things AIX
http://journyx.com/aix_resources.html
Free IBM resource Library on AIX(p5)
http://publib.boulder.ibm.com/infocente ... ources.htm
*Nix related::
O'Reilly Bookshelf
http://antihoe.org/oreilly/
High performance Linux Clustering, Part 1.
http://www-128.ibm.com/developerworks/l ... -cluster1/
Building a linux HPC cluster with xcat
http://www.redbooks.ibm.com/redbooks/SG246623.html
Open your windows with Samba on Linux
http://www.redbooks.ibm.com/Redbooks.ns ... .html?Open
Advanced LDAP User Authentication: Limiting Access to Linux Systems Using the Host Attribute
http://www.redbooks.ibm.com/Redbooks.ns ... .html?Open
Guide to regular expressions
http://www.regular-expressions.info/tutorial.html
Getting win-based network cards to work under Linux
http://sourceforge.net/projects/ndiswrapper/
Security::
NIST's Vulnerability Database
http://nvd.nist.gov/nvd.cfm?cvename=CAN-2004-0802
Linux/Unix Advisories (menu bar on left)
http://www.linuxsecurity.com/content/blogcategory/0/76/
PF Guide (OpenBSD's Packet Filter firewall)
http://www.openbsd.org/faq/pf/index.html
Enable PF on FreeBSD
http://www.freebsd.org/doc/en_US.ISO885 ... ls-pf.html
SANS Internet Storm Center
http://isc.sans.org/
Top 75 Security Tools
http://www.insecure.org/tools.html
FBSD Security How-To
http://www.secinf.net/unix_security/Fre ... HowTo.html
Security Focus
http://www.securityfocus.com/tools