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Learn Linux Shell Scripting – Fundamentals of Bash 4.4

You're reading from   Learn Linux Shell Scripting – Fundamentals of Bash 4.4 A comprehensive guide to automating administrative tasks with the Bash shell

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Product type Paperback
Published in Dec 2018
Publisher Packt
ISBN-13 9781788995597
Length 452 pages
Edition 1st Edition
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Author (1):
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Sebastiaan Tammer Sebastiaan Tammer
Author Profile Icon Sebastiaan Tammer
Sebastiaan Tammer
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Table of Contents (20) Chapters Close

Preface 1. Introduction FREE CHAPTER 2. Setting Up Your Local Environment 3. Choosing the Right Tools 4. The Linux Filesystem 5. Understanding the Linux Permissions Scheme 6. File Manipulation 7. Hello World! 8. Variables and User Input 9. Error Checking and Handling 10. Regular Expressions 11. Conditional Testing and Scripting Loops 12. Using Pipes and Redirection in Scripts 13. Functions 14. Scheduling and Logging 15. Parsing Bash Script Arguments with getopts 16. Bash Parameter Substitution and Expansion 17. Tips and Tricks with Cheat Sheet 18. Assessments 19. Other Books You May Enjoy

Chapter 10

  1. What is a search pattern?
    A regular expression syntax which allows us to find pieces of text with specified characteristics, such as length, content and location on a line.
  2. Why are regular expressions considered greedy?
    Most regular expression try to find as much data as they can that match the search pattern. This includes whitespace and other punctuation, which is a logical separation for humans but not necessarily for a machine.
  3. Which character in search patterns is considered a wildcard for any one character, except newlines?
    The dot (.).
  4. How is the asterisk used in Linux regular expression search patterns?
    The * is used in combination with another character to allow it to form a repeating character. Example search pattern: spe*d will match spd, sped, speed, speeeeeeeeed, and so on.
  5. What are line anchors?
    The special characters used to denote line beginnings and...
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