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  • Book Overview & Buying The Ultimate Linux Shell Scripting Guide
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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

Introduction to Text-Stream Filters

As either a Linux systems administrator or an office worker who uses Linux on the desktop, you’ll probably have a certain number of text files that you need to work with. You may even get tasked with extracting data from these files and presenting the data effectively.

Or, you might need to extract data from utilities that show the status of your Linux system or from within scripts that automatically scrape the web for some specific information. The text-stream filter utilities that I present in this topic can help make these jobs easier. Once you learn them, you may even find that you can extract and display data with them more quickly than you could with text editors or word processors.

Figure 6.1: The basic concept of text-stream filters

With only one exception, you won’t use these utilities to modify the original text file. You’ll use them either to view the selected data on-screen, pipe the selected data...

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