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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

Escaping and Quoting

Whenever you type anything on the command-line or into a shell script, you’ll be using a mix of normal alphanumeric text and non-alphanumeric characters. Some of these characters have special meanings within the shell, and will cause the shell to perform in some special way. Sometimes, you’ll want the shell to interpret these special characters as normal text, instead of as something with a magical power. To do that, you can either escape or quote the special characters.

There are two general classes of characters that can be interpreted by the shell from within a shell command. These are:

  • Normal characters: bash and zsh interpret these characters literally. In other words, they have no special meaning to the shell.
  • Metacharacters: These characters have special meanings for bash and zsh. You could say that a metacharacter provides some sort of special instruction to these shells.

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