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Bash Quick Start Guide

You're reading from   Bash Quick Start Guide Get up and running with shell scripting with Bash

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Product type Paperback
Published in Sep 2018
Publisher Packt
ISBN-13 9781789538830
Length 186 pages
Edition 1st Edition
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Author (1):
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Tom Ryder Tom Ryder
Author Profile Icon Tom Ryder
Tom Ryder
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Table of Contents (10) Chapters Close

Preface 1. What is Bash? FREE CHAPTER 2. Bash Command Structure 3. Essential Commands 4. Input, Output, and Redirection 5. Variables and Patterns 6. Loops and Conditionals 7. Scripts, Functions, and Aliases 8. Best Practices 9. Other Books You May Enjoy

Summary

Even if you feel that you already know the basic structure of a Bash command well, carefully looking at the structure of a typical command line and knowing the rules of string quoting can make it much clearer what's wrong when something doesn't behave as expected. We use single quotes to keep characters literal, and double quotes to safely perform expansion for variables and substitutions. Developing disciplined habits with quoting and understanding how Bash runs commands in sequence is helpful not just for scripting, but for interactive command line work as well.

Having learned the structure of a Bash command line, in the next chapter we'll apply it to learning some essential commands that will form the basis of many shell scripts.

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