Linux

See also what's at Wikipedia, your library, or elsewhere.

• Advanced Linux Programming, by Mark Mitchell, Jeffrey Oldham, and Alex Samuel (PDF with commentary at advancedlinuxprogramming.com)
• After the Software Wars (2009), by Keith Curtis (page images at Google)
• The Cathedral and the Bazaar (prepublication version, with commentary), by Eric S. Raymond (multiple formats at catb.org)
• Complete On-Line Works, by Linux Documentation Project (HTML at Ibiblio)
• Debian GNU/Linux: Guide to Installation and Usage, by John Goerzen and Ossama Othman
  • HTML at newriders.com
  • Gutenberg text
• The Debian Linux User's Guide (second edition, c1998), by Dale Scheetz (HTML at linuxmafia.com)
• Free for All: How Linux and the Free Software Movement Undercut the High-Tech Titans, by Peter Wayner (PDF with commentary at wayner.org)
• GNU Autoconf, Automake, and Libtool, by Gary V. Vaughan, Ben Elliston, Tom Tromey, and Ian Lance Taylor (HTML with commentary at redhat.com)
• Java Application Development on Linux, by Carl Albing and Michael Schwarz (PDF at phptr.com)
• KDE 2.0 Development, by David Sweet (HTML at kde.org)
• Learning Debian GNU/Linux, by Bill McCarty (HTML at oreilly.com)
• The Linux Development Platform (2002), by Rafeeq Ur Rehman and Christopher Paul (zipped PDF at phptr.com)
• Linux From Scratch (electronic edition), by Gerard Beekmans (HTML with commentary at linuxfromscratch.org)
• Linux Installation and Getting Started (c1998), by Matt Welsh (HTML at tldp.org)
• Linux Kernel Module Programming Guide, by Peter Jay Salzman and Ori Pomerantz (HTML at faqs.org)
• Linux Network Administrator's Guide (online first edition, 1996), by Olaf Kirch (HTML at tldp.org)
• Linux Network Administrator's Guide (second edition, 2000), by Olaf Kirch and Terry Dawson (illustrated HTML at oreilly.com)
• Linux Quick Fix Notebook, by Peter Harrison (PDF at phptr.com)
• Managing Linux systems With Webmin: System Administration and Module Development (2004), by Jamie Cameron (PDF at phptr.com)
• Maximum RPM: Taking the Red Hat Package Manager to the Limit, by Edward C. Bailey (HTML at rpm.org)
• Open Sources: Voices from the Open Source Revolution (1999), ed. by Chris DiBona, Sam Ockman, and Mark Stone (HTML at oreilly.com)
• Programming From the Ground Up, by Jonathan Bartlett, ed. by Dominick Bruno
  • version 1.0: PDF at gnu.org
  • multiple versions with commentary at nongnu.org
• Programming Linux Games, by Loki Software and John R. Hall (PDF in France)
• Securing and Optimizing Linux (version 2.0, 2001), by Gerhard Mourani (PDF at openna.com)
• Self-Service Linux: Mastering the Art of Problem Determination (2006), by Mark Wilding and Dan Behman (PDF at phptr.com)
• Slackware Linux Essentials (electronic edition), by Alan Hicks, Chris Lumens, David Cantrell, and Logan Johnson (multiple formats at slackbook.org)
• Ubuntu Hacks (c2006), by Jonathan Oxer, Kyle Rankin, and Bill Childers (illustrated HTML at oreilly.com)
• Understanding the Linux Virtual Memory Manager (2004), by Mel Gorman (PDF at phptr.com)

Items below (if any) are from related and broader terms.