ANSI C for Programmers on UNIX Systems
by Tim Love
This document aims to introduce C by providing and explaining examples of common programming tasks, and to enable the reader to learn from available source code by clarifying common causes of incomprehension. The first part of the document is an informal introduction to C.
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by Chet Ramey, Brian Fox - gnu.org
A description of the features that are present in the Bash shell. GNU Bash is an implementation of the POSIX.2 specification, with additional features from the C-shell and Korn shell. Most Bourne shell scripts can be run by Bash without modification.
by Aurelio A. Heckert - Wikibooks
Awk has two faces: it is a utility for performing simple text-processing tasks, and it is a programming language for performing complex text-processing tasks. Awk is useful for simple, quick-and-dirty computational programming.
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.
by Brian "Beej Jorgensen" Hall
This document discusses several methods of Interprocess Communication, some of which are better suited to certain tasks than others. If you know C or C++ and are pretty good using a Unix environment, these documents are for you.