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Linux Command Line and Shell Scripting Bible

Linux Command Line and Shell Scripting Bible - Third Edition

By : Richard Blum, Christine Bresnahan
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Linux Command Line and Shell Scripting Bible

Linux Command Line and Shell Scripting Bible

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)
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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
2
Appendix B: Quick Guide to sed and gawk

Running Scripts in Background Mode

Sometimes, running a shell script directly from the command line interface is inconvenient. Some scripts can take a long time to process, and you may not want to tie up the command line interface waiting. While the script is running, you can't do anything else in your terminal session. Fortunately, there's a simple solution to that problem.

When you use the ps command, you see a whole bunch of different processes running on the Linux system. Obviously, all these processes are not running on your terminal monitor. This is called running processes in the background. In background mode, a process runs without being associated with a STDIN, STDOUT, and STDERR on a terminal session (see Chapter 15).

You can exploit this feature with your shell scripts as well, allowing them to run behind the scenes and not lock up your terminal session. The following sections describe how to run your scripts in background mode on your Linux system.

Running in the...

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