LinuxCentral: www.linuxcentral.com

Security Patches at Debian.org: www.debian.org/security

Other Linux Distributions Based on Debian and Able to Run Debian Packages: linuxmafia.com/faq/Debian/installers.html and www.debian.org/misc/children-distros

Bochs: bochs.sourceforge.net

“Securing Debian Manual”: www.debian.org/doc/manuals/securing-debian-howto