Excellent reference for complex Korn shell scripting.

Frequently asked questions about the awk scripting language, a common feature of shell scripts.

Introduction to scripting in the BASH environment.

Concise guide to programming in the BASH environment.

A libarary used to write BASH shell scripts for CGI.

Comprehensive guide to bourne shell scripting.

Comprehensive bourne shell/BASH tutorial, lots of example code.

FAQ file for CCsh, a bourne shell to C cross-compiler.

A collection of portable shell scripts compiled into a monolithic utility by the Free Software Foundation.

UNIX shell scripting resource. Examples, tips and tricks.

Introduction to shell scripting. Covers basics and relevant details for more advanced scripting.

Guide to programming in the Korn shell environment.

Tutorial for using the PHP language for shell automation, hosted at PHPBuilder.com

A compiler for bourne shell scripts.

Unix Review's monthly shell programming column. Sample scripts and commentary,

from UW.

Elaborately abusive commentary on bad shell scripting techniques.