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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

Shell Script Portability

As we’ll see in a bit, many different shells are available for Linux, Unix, and Unix-like operating systems. Thus far though, we’ve mainly just been working with bash. The big advantage of bash is that it comes already installed on most Linux distros, macOS, and OpenIndiana. It normally isn’t installed by default on the BSD-type distros, but you can install it yourself, if you need to.

The big advantage of bash is that it can use different scripting constructs that can make life easier for scripters. The big disadvantage of bash is that many of these bash constructs aren’t always available in non-bash shells. That’s not a big problem if you can install bash on all of your machines, but that’s not always possible. (I’ll explain why in just a bit.)

In this chapter, I’ll show you some of the bash alternatives that you might encounter, and how to make your shell scripts run on a wide variety of these...

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