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The Ultimate Linux Shell Scripting Guide

The Ultimate Linux Shell Scripting Guide

By : Donald A. Tevault
4.8 (5)
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The Ultimate Linux Shell Scripting Guide

The Ultimate Linux Shell Scripting Guide

4.8 (5)
By: Donald A. Tevault

Overview of this book

Embark on a comprehensive journey through command shells with this hands-on manual. While Bash is a Linux staple, Z shell and PowerShell are rising stars, applicable to Linux, macOS, and Unix. Progress seamlessly through chapters, each building on the last, creating a solid foundation. Learn through a unique approach: concepts, examples, and interactive labs. These labs, nearly a hundred strong, form the core of experiential learning, essential for script creation. Focusing on Linux commands and their scripting applications, this manual is universally relevant across Linux and select Unix-like systems. It goes beyond theory, offering practical scripts for real-world Linux administration. Scripts are designed for manageability, aiding learning and troubleshooting. The goal is to nurture the ability to craft intelligent, functional shell scripts. While centered on Bash, this book offers a peek into the future with Z Shell and PowerShell, expanding your skills and adaptability. This book is systematically structured and engaging so that it will guide you to master command shells, equipping you for real-world Linux challenges.
Table of Contents (26 chapters)
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24
Other Books You May Enjoy
25
Index

Executing Multiple Commands at Once

From either the command-line or from within shell scripts, it’s handy to know how to combine multiple commands into one single command. In this section, I’ll demonstrate three ways to do that which are:

  • Running commands interactively
  • Using command sequences
  • Using the find utility

Running Commands Interactively

This is a form of shell-script programming, except that you’re just executing all commands from the command-line, instead of actually writing, saving, and executing a script. Here, you are creating a for loop – with each command of the loop on its own separate line – to perform a directory listing three times.

[donnie@fedora ~]$ for var in arg1 arg2 arg3
> do
> echo $var
> ls
> done
. . .
. . .
[donnie@fedora ~]$

At the end of each line, you’ll hit the Enter key. But, nothing will happen until you type the done command on the final line. The...

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