Here you find links to sites that teach or explain the different facets of Linux.
Linux Documentation Project: HOWTOs: subject-specific help latest updates | main index | browse by category Guides: longer, in-depth books latest updates / main index !FAQs: Frequently Asked Questions latest updates / main index man pages:
LINUX: Rute User's Tutorial and Exposition: by Paul Sheer. Available in to read online or download as HTML or pdf file. Also available in book format. This book covers GNU/LINUX system administration, for popular distributions like !RedHat and Debian, as a tutorial for new users and a reference for advanced administrators. It aims to give concise, thorough explanations and practical examples of each aspect of a UNIX system. Anyone who wants a comprehensive text on (what is commercially called) “LINUX” need look no further–there is little that is not covered here.
Directory of Linux Commands: This alphabetical directory of Linux commands is from Linux in a Nutshell, 4th Edition. Click on any of the 515 commands to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.
O'Reilly is a rich source of material even if you do not want to subscribe or buy:
Printed Books: Recommended paper books, including O'Reilly's.
General Linux sites: Diverse Linux sites, that defy classification.
Hardware: Printing, Sound, W-LAN, everything that will break if you drop it…
Laptops: Links related to Laptops, PDAs, etc.
Magazines: Magazines, online or in print, that are focused on Linux
Knoppix Docs: Links to Knoppix documentation
Mandriva Docs: Links to Mandriva documentation
Slackware Docs: Links to Slackware documentation
Suse Docs: Links to Suse documentation