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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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Accessing the shell

First, let's briefly discuss various shell access methods. It can be as simple as just installing a virtual machine with Linux that's running text mode only, but it could also be a virtual machine with the GUI. That would require us doing something to have access to text mode; so, let's learn about these different ways of getting access to the shell.

It's also important to understand why accessing the shell is so important. The reasoning behind this is simple, which is that we can do a lot more in the shell than in the GUI. In the second part of this book, we're going to dig deeper into the concept of shell scripting, and then it's going to become obvious how that applies to our statement about being able to do a lot more in the shell.

Getting ready

For starters, we need to deploy our two virtual machines. We can actually install both of these machines as text-mode machines with the OpenSSH server (the installation process...

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