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Mastering Linux Shell Scripting

You're reading from   Mastering Linux Shell Scripting A practical guide to Linux command-line, Bash scripting, and Shell programming

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Product type Paperback
Published in Apr 2018
Publisher
ISBN-13 9781788990554
Length 284 pages
Edition 2nd Edition
Languages
Tools
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Authors (2):
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Mokhtar Ebrahim Mokhtar Ebrahim
Author Profile Icon Mokhtar Ebrahim
Mokhtar Ebrahim
Andrew Mallett Andrew Mallett
Author Profile Icon Andrew Mallett
Andrew Mallett
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Table of Contents (17) Chapters Close

Preface 1. The What and Why of Scripting with Bash FREE CHAPTER 2. Creating Interactive Scripts 3. Conditions Attached 4. Creating Code Snippets 5. Alternative Syntax 6. Iterating with Loops 7. Creating Building Blocks with Functions 8. Introducing the Stream Editor 9. Automating Apache Virtual Hosts 10. AWK Fundamentals 11. Regular Expressions 12. Summarizing Logs with AWK 13. A Better lastlog with AWK 14. Using Python as a Bash Scripting Alternative 15. Assessments 16. Other Books You May Enjoy

Preface

First, you'll learn about Linux shells and why we chose the bash shell. Then, you'll learn how to write a simple bash script and how to edit your bash script using Linux editors.

Following this, you will learn how to define a variable and the visibility of a variable. After this, you will learn how to store command execution output into a variable, which is called command substitution. Also, you will learn how to debug your code using bash options and Visual Studio Code. You will learn how to make your bash script interactive to the user by accepting input from the user using the read command. Then, you will learn how to read options and its values if the user passed them to the script. Following this, you will learn how to write conditional statements such as if statements and how to use case statements. After this, you will learn how to create code snippets using vim and Visual Studio Code. For repetitive tasks, you will see how to write for loops, how to iterate over simple values, and how to iterate over directory content. Also, you will learn how to write nested loops. Along with this, you will write while and until loops. Then, we will move on to functions, the reusable chunks of code. You will learn how to write functions and how to use them. After this, you will be introduced to one of the best tools in Linux, which is Stream Editor. As we are still talking about text processing, we will introduce AWK, one of the best text processing tools in Linux that you will ever see.

After this, you will learn how to empower your text processing skills by writing better regular expressions. Finally, you will be introduced to Python as an alternative to bash scripting.

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