Pro Bash: Learn to Script and Program the GNU/Linux Shell [3 ed.] 1484295870, 9781484295878, 9781484295885

Learn how to effectively utilize the Bash shell in your programming. This refreshed and expanded third edition has been

238 7 1MB

English Pages xxi, 305 Year 2023

Pro Bash: Learn to Script and Program the GNU/Linux Shell [3 ed.]
1484295870, 9781484295878, 9781484295885

Author / Uploaded
Jayant Varma

Commentary
Publisher ePUB | Published: 22 November 2023

Table of contents :
Table of Contents
About the Authors
About the Technical Reviewer
Acknowledgments
Chapter 1: Hello, World: Your First Shell Program
What Is a Shell Script?
The Hello World Code
The Hello World Program File
Naming the Script File
Selecting a Directory for the Script
Creating the File and Running the Script
Choosing and Using a Text Editor
Building a Better “Hello, World!”
Summary
Commands
Concepts
Variables
Exercises
Chapter 2: Input, Output, and Throughput
Parameters and Variables
Positional Parameters
Special *@#0$?_!- Parameters
Variables
Arguments and Options
Why You Should Avoid echo
printf: Formatting and Printing Data
Escape Sequences
Format Specifiers
Width Specification
Printing to a Variable
Line Continuation
Standard Input/Output Streams and Redirection
Redirection: >, >>, and

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