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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 tr

You can use tr for a variety of translation chores. (After all, tr does stand for translate.) Rather than translating from one language to another, tr translates from one character to another, from a range of characters to another, or from one class of characters to another. You can also delete selected characters from a file or eliminate duplicate characters.

Compared to the utilities that we’ve looked at so far, there’s a big difference with how tr operates. The other utilities that we’ve looked at so far can get their input from arguments that you would supply on the command-line. So, you don’t need to use the stdin redirector with them. The tr utility can’t use arguments, so you’ll either have to use a stdin redirector or pipe its input in from another command.

For the first example, create the file translation.txt, and use tr to change every occurrence of a single character. Make the file look like this:

[donnie@fedora...

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