Shell scripting includes many problem-solving tools. There is a rich set of tools for text processing. These tools include utilities, such as sed, awk, grep, and cut, which can be combined to perform text processing needs.
These utilities process files by character, line, word, column, or row to process text files in many ways.
Regular expressions are a basic pattern-matching technique. Most text-processing utilities support regular expressions. With regular expression strings, we can filter, strip, replace, and search within text files.
This chapter includes a collection of recipes to walk you through many solutions to text processing problems.
