For people who create and modify text files, sed and awk are power tools for editing. sed, awk, and regular expressions allow programmers and system administrators to automate editing tasks that need to be performed on one or more files, to simplify the task of performing the same edits on multiple files, and to write conversion programs.The sed & awk Pocket Reference is a companion volume to sed & awk, Second Edition, Unix in a Nutshell, Third Edition, and Effective awk Programming, Third Edition. This new edition has expanded coverage of gawk (GNU awk), and includes sections on:

• An overview of sed and awk?s command line syntax
• Alphabetical summaries of commands, including nawk and gawk
• Profiling with pgawk
• Coprocesses and sockets with gawk
• Internationalization with gawk
• A listing of resources for sed and awk users