Working With grep, sed, And awk Pocket Primer

The  goal of this book is to introduce readers to three powerful command  line utilities that can be combined to create simple yet powerful shell  scripts for performing a multitude of tasks. The code samples and  scripts use the bash shell, and typically involve very small text files  so that you can focus on understanding the features of grep, sed, and  awk. In the simplest terms, grep (global regular expression print) will search input files in data for certain words or word patterns and print the lines that match it. sed is useful for changing or modifying data. Awk is a programming language also used for searching a data file for  certain patterns, but can also perform certain tasks on the pattern  matches it finds. Aimed at a reader relatively new to working in a bash  environment, the book is comprehensive enough to be a good reference and  teach a few new tricks to those who already have some experience with  these command line utilities.

FEATURES:

• Designed for readers relatively new to working in a bash environment
• Introduces  readers to three powerful command line utilities that can be combined  to createsimple yet powerful shell scripts for performing a multitude of  tasks
• Includes numerous code samples and scripts using the bash shell, and typically involvesmall, text files
• Features a separate chapter on regular expressions using these tools