GNU Bash Reference Manual
by Chet Ramey, Brian Fox
Publisher: Network Theory Ltd. 2006
Number of pages: 204
This text is a brief description of the features that are present in the Bash shell. GNU Bash is a complete implementation of the POSIX.2 shell specification (/bin/sh), with additional features from the C-shell (csh) and Korn shell (ksh). Most Bourne shell scripts can be run by Bash without modification.
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by David A. Curry - O'Reilly
The nitty gritty details on how UNIX interacts with applications. If you're working on any System V Release 4 platform, you'll find this book indispensable. It contains examples on topics ranging from string manipulation to network 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 Peter H. Salus - Reed Media Services
In addition to covering a history of free and open source, The Daemon, the Gnu, and the Penguin explores how free and open software is changing the world. It is authored by Peter Salus, a noted UNIX, open source, and Internet historian and author.
by Jim Tyson, et al. - Wikibooks
Unix is an operating system designed for use on any kind of computer or computing device. It is a multi-tasking, multi-user system. Unix is also part of the underlying technology of the Internet. Many of the web servers run Apache under Unix.