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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

Introducing awk

awk is a pattern-scanning and text-processing utility that you can use to automate the process of creating reports and databases. With its built-in math functions, you can also use it to perform spreadsheet operations on text files of columnar, numerical data. The term awk comes from the names of its creators, Aho, Weinberger and Kernighan. The original version is now referred to as “old awk". Newer implementations, such as nawk and gawk, have more features and are somewhat easier to use.

The version of awk you have depends upon which operating system you’re running. Most Linux operating systems run gawk, which is the GNU implementation of awk. There’s most always an awk symbolic link that points to the gawk executable, as you see here on my Fedora workstation:

[donnie@fedora ~]$ awk --version
GNU Awk 5.1.1, API: 3.1 (GNU MPFR 4.1.1-p1, GNU MP 6.2.1)
Copyright (C) 1989, 1991-2021 Free Software Foundation.
This program is free software...

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