© David Both 2020
D. BothUsing and Administering Linux: Volume 2https://doi.org/10.1007/978-1-4842-5455-4_6

6. Regular Expressions

David Both1 
(1)
Raleigh, NC, USA
 

Objectives

In this chapter you will learn
  • To define the term “regular expression”

  • To describe the purpose of regular expressions and extended regular expressions

  • To differentiate between different styles of regular expressions as used by different tools

  • To state the difference between basic regular expressions and extended regular expressions

  • To identify and use many of the metacharacters and expressions used to build regular expressions for typical administrative tasks

  • To use regular expressions and extended regular expressions with tools like grep and sed

Introducing regular expressions

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