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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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Backing up the current directory with shell script arguments and variables

One of the most common reasons why system engineers use Bash shell scripting is for backup purposes. There are various tools available, but for shell scripting purposes, we are going to make a couple of tar-based shell scripts, work with arguments and variables, and learn how to make our jobs easier by using shell scripting for backup purposes. Let's take a look!

Getting ready

Before you start this recipe, you need to make sure that you have tar installed on your Linux machine. For this, you need to use the following command:

sudo apt-get -y install tar

If you're using a CentOS-based machine, use the following command:

sudo yum -y install tar

Now, you're ready to get started.

How to do it…

Our premise for this first backup script, which is based on tar, is simple:

  • We want to be able to create a backup while using an argument to set the backup's filename...

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