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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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Implementing commonly used procedures via functions

By this point, we have created a lot of different and very simple scripts that more or less used echo and a few commands just to show how a particular thing in bash works. In this recipe, we are going to give you a couple of ideas on how to use what we have learned so far.

Getting ready

We are going to create a small script that is going to show you how to easily automate the most mundane tasks on any system. The idea here is not to show you every task possible, but instead to show you how to tackle the most common problems.

How to do it…

Before we even start with the script, we need to go back to the recipes where we were explaining how to start writing scripts. What we are talking about are the prerequisites and presumptions we are going to make when we create and run this script.

Every script will have its own prerequisites. These are usually a list of things that your script needs to run—either...

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