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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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Chapter 17: Advanced Shell Script Examples

So far, we have done all we could to show you different ways scripts can be written, and we went through a lot of examples of how different tasks can be accomplished. In this chapter, we are going to implement all this in a much more complex way in scripts that can be used in real life.

The scripts we are going to show you in this chapter solve everyday problems for system administrators, from dealing with creating new users to working with virtual machines (VMs). By walking you through these examples, our aim is not only to show you how scripts should work but also what they should look like and how to approach writing them.

In this chapter, we are going to cover the following shell script examples:

  • Implementing a web server service and security settings
  • Creating users and groups from a standardized input file and a standardized password and forcing users to change them on the next login
  • Creating users and groups from...

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