Regular expressions
Bash Guide for Beginners
PrevNext

Chapter 4. Regular expressions

Table of Contents
4.1. Regular expressions
4.1.1. What are regular expressions?
4.1.2. Regular expression metacharacters
4.1.3. Basic versus extended regular expressions
4.2. Examples using grep
4.2.1. What is grep?
4.2.2. Grep and regular expressions
4.3. Pattern matching using Bash features
4.3.1. Character ranges
4.3.2. Character classes
4.4. Summary
4.5. Exercises

In this chapter we discuss:

  • Using regular expressions

  • Regular expression metacharacters

  • Finding patterns in files or output

  • Character ranges and classes in Bash

PrevHomeNext
Exercises Regular expressions
17 visits (2 today, 11 this week, 17 this month, 17 this year)
Uptime: 16:46:41 up 6 days, 4:22, 2 users, load average: 0.04, 0.05, 0.01
216.73.216.83 GET from server z.larrymurakami.com

Wednesday, February 11, 2026 @ 4:46:41 PM
z.ServerAdmin@lamurakami.com