Linux (computer operating system)

The Cathedral and the Bazaar: Musings on Linux and Open Source by an Accidental Revolutionary (O'Reilly Linux)

Eric S. Raymond

The Linux Programming Interface: A Linux and Unix System Programming Handbook

by Michael Kerrisk

Linux: the complete reference

Richard Petersen.

Linux in a Nutshell

Arnold Robbins, Jessica Perry Hekman, Stephen Spainhour, Stephen Figgins, Ellen Siever, Robert Love, Aaron Weber

Linux bible

Christopher Negus

Running Linux

Matthias Kalle Dalheimer and Matt Welsh.

Essential System Administration

Æleen Frisch.

Building Embedded Linux Systems

Karim Yaghmour ... [et al.].

LPI Linux Certification in a Nutshell (In a Nutshell (O'Reilly))

Steven Pritchard, Adam Haeder, Jeffrey Dean, Jeff Dean, Nicolai Langfeldt, Bruno Pessanha, James Stanger

How Linux works: what every superuser should know

by Brian Ward.