http://www.redhat.com/ — On the Red Hat website, you find links to the Linux Documentation Project (LDP), online versions of the Red Hat Enterprise Linux manuals, FAQs (Frequently Asked Questions), a database which can help you find a Linux Users Group near you, technical information in the Red Hat Support Knowledge Base, and more.

http://www.linuxheadquarters.com/ — The Linux Headquarters website features easy to follow, step-by-step guides for a variety of Linux tasks.