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Linux Command Line and Shell Scripting Techniques

Linux Command Line and Shell Scripting Techniques

By : Vedran Dakic, Jasmin Redzepagic
4.4 (5)
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Linux Command Line and Shell Scripting Techniques

Linux Command Line and Shell Scripting Techniques

4.4 (5)
By: Vedran Dakic, Jasmin Redzepagic

Overview of this book

Linux Command Line and Shell Scripting Techniques begins by taking you through the basics of the shell and command-line utilities. You’ll start by exploring shell commands for file, directory, service, package, and process management. Next, you’ll learn about networking - network, firewall and DNS client configuration, ssh, scp, rsync, and vsftpd, as well as some network troubleshooting tools. You’ll also focus on using the command line to find and manipulate text content, via commands such as cut, egrep, and sed. As you progress, you'll learn how to use shell scripting. You’ll understand the basics - input and output, along with various programming concepts such as loops, variables, arguments, functions, and arrays. Later, you’ll learn about shell script interaction and troubleshooting, before covering a wide range of examples of complete shell scripts, varying from network and firewall configuration, through to backup and concepts for creating live environments. This includes examples of performing scripted virtual machine installation and administration, LAMP (Linux, Apache, MySQL, PHP) stack provisioning and bulk user creation for testing environments. By the end of this Linux book, you’ll have gained the knowledge and confidence you need to use shell and command-line scripts.
Table of Contents (19 chapters)
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Shell script hygiene

Commenting is not just something you can do; it's an art by itself. In this part of the chapter, we are going to deal with comments in order to make your life easier when writing scripts, but the advice and best practices that are given here are easily used in any programming language that we can think of. Really understanding how to comment in a useful way is something that you're going to need to learn, since it will help anybody going to use your scripts after you are done writing them.

So, what are comments? Possibly the easiest way to describe them is to say that they are documentation on what the script is intended to do, how the script works, and who has created the script, and they provide more information on technical details of the script, such as when it was created.

Commenting is something that you should automatically want to do. Nobody is perfect and nobody has a perfect memory. Comments are there to help you remember what you did...

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