This ebook is an excellent introduction to sed. Rather than being a conversion from a printed volume, it was specifically designed and formatted for viewing on an ebook reader. Well-written, informative, and useful as a reference as well as a tutorial. Highly recommended.
Dale Dougherty and Arnold Robbins, Sed and Awk, 2nd edition, O'Reilly and Associates, 1997, 1-156592-225-5.
Unfolding the full power of shell scripting requires at least a passing familiarity with sed and awk. This is the classic tutorial. It includes an excellent introduction to Regular Expressions. Recommended.
Jeffrey Friedl, Mastering Regular Expressions, O'Reilly and Associates, 2002, 0-596-00289-0.
Aeleen Frisch, Essential System Administration, 3rd edition, O'Reilly and Associates, 2002, 0-596-00343-9.
This excellent manual provides a decent introduction to shell scripting from a sys admin point of view. It includes comprehensive explanations of the startup and initialization scripts in a UNIX system.
Stephen Kochan and Patrick Wood, Unix Shell Programming, Hayden, 1990, 067248448X.
Still considered a standard reference, though somewhat dated, and a bit "wooden" stylistically speaking.  In fact, this book was the ABS Guide author's first exposure to UNIX shell scripting, lo these many years ago.
Neil Matthew and Richard Stones, Beginning Linux Programming, Wrox Press, 1996, 1874416680.
Surprisingly good in-depth coverage of various programming languages available for Linux, including a fairly strong chapter on shell scripting.
Herbert Mayer, Advanced C Programming on the IBM PC, Windcrest Books, 1989, 0830693637.
Excellent coverage of algorithms and general programming practices. Highly recommended, but unfortunately out of print.
David Medinets, Unix Shell Programming Tools, McGraw-Hill, 1999, 0070397333.
Pretty good treatment of shell scripting, with examples, and a short intro to Tcl and Perl.
Cameron Newham and Bill Rosenblatt, Learning the Bash Shell, 2nd edition, O'Reilly and Associates, 1998, 1-56592-347-2.
This is a valiant effort at a decent shell primer, but sadly deficient in its coverage of writing scripts and lacking sufficient examples.
A very handy pocket reference, despite lacking coverage of Bash-specific features.
Jerry Peek, Tim O'Reilly, and Mike Loukides, Unix Power Tools, 3rd edition, O'Reilly and Associates, Random House, 2002, 0-596-00330-7.
Contains a couple of sections of very informative in-depth articles on shell programming, but falls short of being a self-teaching manual. It reproduces much of the Regular Expressions tutorial from the Dougherty and Robbins book, above. The comprehensive coverage of UNIX commands makes this book worthy of a place on your bookshelf.
Clifford Pickover, Computers, Pattern, Chaos, and Beauty, St. Martin's Press, 1990, 0-312-04123-3.
A treasure trove of ideas and recipes for computer-based exploration of mathematical oddities.
George Polya, How To Solve It, Princeton University Press, 1973, 0-691-02356-5.
The classic tutorial on problem-solving methods (algorithms), with special emphasis on how to teach them.
Chet Ramey and Brian Fox, The GNU Bash Reference Manual, Network Theory Ltd, 2003, 0-9541617-7-7.
This manual is the definitive reference for GNU Bash. The authors of this manual, Chet Ramey and Brian Fox, are the original developers of GNU Bash. For each copy sold, the publisher donates $1 to the Free Software Foundation.
Arnold Robbins, Bash Reference Card, SSC, 1998, 1-58731-010-5.
Excellent Bash pocket reference (don't leave home without it, especially if you're a sysadmin). A bargain at $4.95, but unfortunately no longer available for free download.
Arnold Robbins, Effective Awk Programming, Free Software Foundation / O'Reilly and Associates, 2000, 1-882114-26-4.
The absolute best awk tutorial and reference. The free electronic version of this book is part of the awk documentation, and printed copies of the latest version are available from O'Reilly and Associates.
This book served as an inspiration for the author of the ABS Guide.
Bill Rosenblatt, Learning the Korn Shell, O'Reilly and Associates, 1993, 1-56592-054-6.
This well-written book contains some excellent pointers on shell scripting in general.
Paul Sheer, LINUX: Rute User's Tutorial and Exposition, 1st edition, , 2002, 0-13-033351-4.
Very detailed and readable introduction to Linux system administration.
This book may not be available anymore?
Ellen Siever and the staff of O'Reilly and Associates, Linux in a Nutshell, 2nd edition, O'Reilly and Associates, 1999, 1-56592-585-8.
The all-around best Linux command reference. It even has a Bash section.
Dave Taylor, Wicked Cool Shell Scripts: 101 Scripts for Linux, Mac OS X, and Unix Systems, 1st edition, No Starch Press, 2004, 1-59327-012-7.
Pretty much what the title promises . . .
The UNIX CD Bookshelf, 3rd edition, O'Reilly and Associates, 2003, 0-596-00392-7.
An array of seven UNIX books on CD ROM, including UNIX Power Tools, Sed and Awk, and Learning the Korn Shell. A complete set of all the UNIX references and tutorials you would ever need at about $130. Buy this one, even if it means going into debt and not paying the rent.
Update: Seems to have somehow fallen out of print. Ah, well. You can still buy the dead-tree editions of these books.
The O'Reilly books on Perl. (Actually, any O'Reilly books.)
* * *
Fioretti, Marco, "Scripting for X Productivity,"Linux Journal, Issue 113, September, 2003, pp. 86-9.
Ben Okopnik's well-written introductory Bash scripting articles in issues 53, 54, 55, 57, and 59 of the Linux Gazette (search on the net), and his explanation of "The Deep, Dark Secrets of Bash" in issue 56.
Chet Ramey's Bash - The GNU Shell, a two-part series published in issues 3 and 4 of the Linux Journal, July-August 1994.
Mike G's Bash-Programming-Intro HOWTO.
Richard's Unix Scripting Universe.
Chet Ramey's Bash FAQ.
Greg's WIKI: Bash FAQ (search on the net!).
Example shell scripts at Lucc's Shell Scripts (search on the net).
Example shell scripts at SHELLdorado.
Example shell scripts at Noah Friedman's script site.
Examples from the The Bash Scripting Cookbook, by Albing, Vossen, and Newham.
Example shell scripts at zazzybob (search on the net).
Steve Parker's Shell Programming Stuff. In fact, all of his shell scripting books are highly recommended. See also Steve's Arcade Games written in a shell script.
An excellent collection of Bash scripting tips, tricks, and resources at the Bash Hackers Wiki (search on the net).
Giles Orr's Bash-Prompt HOWTO.
The Pixelbeat command-line reference.
Very nice sed, awk, and regular expression tutorials at The UNIX Grymoire.
The GNU sed and gawk manuals. As you recall, gawk is the enhanced GNU version of awk.
Many interesting sed scripts at the seder's grab bag.
Tips and tricks at Linux Reviews.
Trent Fisher's groff tutorial.
David Wheeler's Filenames in Shell essay.
"Shelltris" and "shellitaire" at Shell Script Games.
YongYe's wonderfully complex Tetris game script (search on the net).
Mark Komarinski's Printing-Usage HOWTO.
The Linux USB subsystem (helpful in writing scripts affecting USB peripherals).
There is some nice material on I/O redirection in chapter 10 of the textutils documentation (search on the net) at the University of Alberta.
Rick Hohensee has written the osimpa i386 assembler entirely as Bash scripts.
dgatwood has a very nice shell script games site, featuring a Tetris® clone and solitaire.
Aurelio Marinho Jargas has written a Regular expression wizard. He has also written an informative book on Regular Expressions, in Portuguese.
Ben Tomkins has created the Bash Navigator directory management tool.
William Park has been working on a project to incorporate certain Awk and Python features into Bash. Among these is a gdbm interface. He has released bashdiff on Freshmeat.net. He has an article in the November, 2004 issue of the Linux Gazette (search on the net) on adding string functions to Bash, with a followup article in the December issue, and yet another in the January, 2005 issue (search on the net).
Peter Knowles has written an elaborate Bash script that generates a book list on the Sony Librie (search on the net) e-book reader. This useful tool facilitates loading non-DRM user content on the Librie (and the newer PRS-xxx-series devices).
Tim Waugh's xmlto is an elaborate Bash script for converting Docbook XML documents to other formats.
Philip Patterson's logforbash logging/debugging script.
AuctionGallery, an application for eBay "power sellers" coded in Bash.
Of historical interest are Colin Needham's original International Movie Database (IMDB) reader polling scripts, which nicely illustrate the use of awk for string parsing. Unfortunately, the URL link is broken.
Fritz Mehner has written a bash-support plugin for the vim text editor. He has also also come up with his own stylesheet for Bash. Compare it with the ABS Guide Unofficial Stylesheet.
Penguin Pete has quite a number of shell scripting tips and hints on his superb site. Highly recommended.
The excellent Bash Reference Manual, by Chet Ramey and Brian Fox, distributed as part of the bash-2-doc package (available as an rpm). See especially the instructive example scripts in this package.
John Lion's classic, A Commentary on the Sixth Edition UNIX Operating System.
The comp.os.unix.shell (search on the net) newsgroup.