Guide to X11
by Steve Ambler, et al.
Publisher: Wikibooks 2010
This book is about the X Window System. Some users describe it as the Unix and Linux graphics drivers. X11 is the graphical environment for most Unix or Unix-like systems, including *BSD and GNU/Linux; it provides access to screen, keyboard, and mouse.
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by Dale Dougherty, Tim O'Reilly - Hayden Books
The book shows how to use UNIX to prepare written documents. An introduction to the ex, vi, and sed editors and troff and nroff text processing tools. At the end, these tools are brought together by the make utility to do any text processing job.
by David A. Wheeler
The book provides a set of design and implementation guidelines for writing secure programs for Linux and Unix systems. This document includes specific guidance for a number of languages, including C, C++, Java, Perl, Python, and Ada95.
This book is a guide to Unix and Unix-like operating systems, such as GNU/Linux and *BSD. The book targets Unix or non-Unix users seeking background, Unix system users, and Unix system administrators (background and administrator instructions).
by Machtelt Garrels
Useful concepts in the daily life of a Bash user. Basic shell knowledge is required. Discussion about common shell practices and building blocks, grep, awk and sed tools with more examples. The second part is about loops, functions and traps.