[Hatch+ 02] Hatch, Brian, James Lee, and George Kurtz. Hacking Linux Exposed: Linux Security Secrets Solutions, Second Edition. Get this book!
[Himanen+ 01] Himanen, Pekka, Manuel Castells, and Linus Torvalds. The Hacker Ethic. An intellectual treatment of hacking and hackers.
[Nemeth+ 02] Nemeth, Evi, Garth Snyder, Trent R. Hein, and Adam Boggs. Unix System Administration Handbook. This is the Bible for Unix sysadmins.
[Raymond+ 97] Raymond, Eric S., and Bob Young. The Cathedral and the Bazaar: Musings on Linux and Open Source. An interesting read about the nature of Open Source, based on Eric Raymond's experience with the development of fetchmail.
[Schneier 00] Schneier, Bruce. Secrets and Lies: Digital Security in a Networked World. Not a book on how to be secure, but on how to think about security, and just how difficult it is to be truly secure. A must-read for just about anyone in this networked world.
[Torvalds+ 01] Torvalds, Linus, and David Diamond. Just for Fun: The Story of an Accidental Revolutionary. The biography of the creator of Linux that's a short, easy, and fun read.
Apache: www.apache.org the official Apache web page
Bugtraq: www.securityfocus.com use to keep track of security vulnerabilities
Hacker information: www.tuxedo.org/~esr/jargonl/entry/HAKMEMlwhat hacking is all about. See also www.tuxedo.org/~esr/jargonl/entry/hackl the real definition of hacker
Linux: www.linux.org information on Linux
Linux security: www.linuxdoc.org/HOWTO/Security-HOWTOl a must-read for securing your Linux box
Mozilla: www.mozilla.org the Mozilla browser is an Open Source web browser
MySQL: www.mysql.com the official MySQL web page
Open Source Development Network: www.osdn.coma network of Open Source web sites including Slashdot, Freshmeat, Sourceforge.net
Open Source: www.opensource.org interesting information and history relating to Open Source software
Perl: www.perl.com all things Perl begin here
Python: www.python.org
PHP: www.php.net PHP central
Sendmail: www.sendmail.org sendmail is the ubiquitous Open Source program that routes the majority of e-mail around the Internet
Slashdot: www.slashdot.org worth looking at daily
Source Forge: www.sourceforge.net Open Source software code for many projects is available here