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The Ultimate Linux Shell Scripting Guide

The Ultimate Linux Shell Scripting Guide

By : Donald A. Tevault
4.9 (8)
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The Ultimate Linux Shell Scripting Guide

The Ultimate Linux Shell Scripting Guide

4.9 (8)
By: Donald A. Tevault

Overview of this book

Dive into the world of Linux shell scripting with this hands-on guide. If you’re comfortable using the command line on Unix or Linux but haven’t fully explored Bash, this book is for you. It’s designed for programmers familiar with languages like Python, JavaScript, or PHP who want to make the most of shell scripting. This isn’t just another theory-heavy book—you’ll learn by doing. Each chapter builds on the last, taking you from shell basics to writing practical scripts that solve real-world problems. With nearly a hundred interactive labs, you’ll gain hands-on experience in automation, system administration, and troubleshooting. While Bash is the primary focus, you'll also get a look at Z Shell and PowerShell, expanding your skills and adaptability. From mastering command redirection and pipelines to writing scripts that work across different Unix-like systems, this book equips you for real-world Linux challenges. By the end, you'll be equipped to write efficient shell scripts that streamline your workflow and improve system automation.
Table of Contents (26 chapters)
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24
Other Books You May Enjoy
25
Index

Using Shell Script Debugging Tools and Techniques

There are a few different debugging tools that we can use, which include shellcheck, checkbashisms, and shall. We’ve already looked at them in Chapter 19—Shell Script Portability, so we won’t look at them again here. Instead, I’ll present some tools and techniques that we haven’t covered yet.

Using echo Statements

Sometimes, if you have a problem with a shell script that you can’t figure out, placing echo statements in strategic locations can help you find the problem.

You may see in other references that some people think of echo statements as the poor man’s debugging tool. That’s because echo is always available, and can be used if you can’t use anything else.

Back in Chapter 16, Creating User Interfaces with yad, dialog, and xdialog, I showed you the xdialog-hello2.sh script, which can automatically detect two things.

  • It can detect...
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