h4k.com

This web site covers the latest malware on the Internet. It is updated frequently and even has videos of what happens when they intentionally install malware on their test systems.

http://malwaredatabase.net/blog/

HowToForge.com is a website dedicated to providing step by step walk-throughs on many different Linux topics, from beginner to advanced. This includes anti-spam, security, networking, and virtualization just to name a few.

http://howtoforge.com/

The Electronic Frontier Foundation is a non-profit organization that works to protect digital rights and civil liberties. Their website contains lots of news and information about past, present, and future digital rights conflicts.

http://www.eff.org/

EFF has an excellent rating as a non-profit organization (see here).

Schneier on Security an excellent blog covering technological and physical security. It is updated frequently and covers lots of modern topics and other breaking issues. On the site there are also a lot of links to his other works and article. Bruce Schneier is an expert cryptographer who has designed and co-designed multiple provably secure encryption algorithms and authored many books as well.

http://www.schneier.com/blog/

Bruce’s fame in the security world has also landed him a humorous set of parody facts.

LinuxSecurity.com is a news site with many links to interesting articles on Linux security and improving computer and network security with Linux. It is updated frequently and also has a good How-To section.

http://www.linuxsecurity.com

An information security web site that is frequently updated. The following archive makes their own text only backups of the articles so the pages load fast. There is also no having to scroll through a dozen pages to read an entire article either.

http://lists.jammed.com/ISN/

The official home page is here:

http://www.infosecnews.org/

Librenix is a web site dedicated to information about Linux systems administration. It contains many links to various project walk-throughs, tutorials, and other interesting things you can do with Linux. Some of the recently covered topics include how to set up a remote calendar server, a DNS server, and an email server.

http://librenix.com/

A good information security news site that is updated multiple times daily, often with cutting-edge industry news.

http://rootsecure.net/

A classic technology news site. Some interesting and worthwhile community insight can usually be found by setting the comment threshold to 4 or 5 on the various submissions.

http://slashdot.org

There is also a section dedicated to security here: http://slashdot.org/search.pl?tid=172