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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

Using cat

The cat utility has nothing to do with our feline friends. It’s used to either view, create, or join multiple text files together. (In fact, the term cat is short for catenate, which is a fancy way of saying “to join two things together, end-to-end”.)

I said in the introduction that Mac users can perform the demos in this chapter on their Macs. Now though, I have to add a bit of a caveat. That’s because there are at least three versions of cat, which all have different sets of option switches. I’ll point out the differences as we go along.

Sometimes, you’ll need to write scripts that are portable across various different operating systems. So, it’s important that you know about these little idiosyncrasies.

By default, stdin for cat is the keyboard, and stdout is the computer screen. If you just type cat at the command prompt, you’ll be able to type in text and make it echo back to you as soon...

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