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Linux Command Line and Shell Scripting Techniques

Linux Command Line and Shell Scripting Techniques

By : 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: 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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Setting up the user shell

Now that we have learned about how to access the shell, let's configure it for our comfortable use. We're going to see a couple of examples so that we can understand how customizable the Linux shell is. Specifically, we're going to customize the look and feel of our prompt.

Getting ready

We just need to keep our virtual machines up and running.

How to do it…

We're going to edit a file called /home/student/.bashrc. Before we do that, let's create a backup copy of the .bashrc file, just in case we make some mistakes:

cp /home/student/.bashrc /home/student/.bashrc.tmp

Before we edit this file, make sure that you take note of how the prompt looks at this point. If you're logged in as student to the cli1 machine, your prompt should look like this:

student@cli1:~$

Let's edit the .bashrc file by using nano. Type in the following command:

nano /home/student/.bashrc

When we type in this command...

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