Book Image

Linux Command Line and Shell Scripting Bible - Third Edition

By : Richard Blum, Christine Bresnahan
Book Image

Linux Command Line and Shell Scripting Bible - Third Edition

By: Richard Blum, Christine Bresnahan

Overview of this book

The Linux command line enables you to type specific shell commands directly into the system to manipulate files and query system resources. Command line statements can be combined into short programs called shell scripts, a practice increasing in popularity due to its usefulness in automation. Linux is a robust system with tremendous potential, and Linux Command Line and Shell Scripting Bible opens the door to new possibilities. Linux Command Line and Shell Scripting Bible is your essential Linux guide. It contains new functional examples that are fully updated to align with the latest Linux features. Beginning with command line fundamentals, the book moves into shell scripting and shows you the practical application of commands in automating frequently performed functions. This book is a complete guide providing detailed instruction and expert advice working within this aspect of Linux. Whether used as a tutorial or as a quick reference, this book contains information that every Linux user should know.
Table of Contents (34 chapters)
2
Part I: The Linux Command Line
13
Part II: Shell Scripting Basics
20
Part III: Advanced Shell Scripting
28
Part IV: Creating Practical Scripts
32
End User License Agreement

Using the Web

Often when you think of shell script programming, the last thing you think of is the Internet. The command line world often seems foreign to the fancy, graphical world of the Internet. There are, however, several different utilities you can easily use in your shell scripts to gain access to data content on the web, as well as on other network devices.

Almost as old as the Internet itself, the Lynx program was created in 1992 by students at the University of Kansas as a text-based browser. Because it's text-based, the Lynx program allows you to browse websites directly from a terminal session, replacing the fancy graphics on web pages with HTML text tags. This allows you to surf the Internet from just about any type of Linux terminal. A sample Lynx screen is shown in Figure 25.2.

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Figure 25.2 Viewing a web page using Lynx

Lynx uses the standard keyboard keys to navigate around the web page. Links appear as highlighted text within the web page. Using the right-arrow...