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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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Chapter 16: Shell Script Examples for Server Management, Network Configuration, and Backups

Now that we've covered everything that we wanted to cover in terms of various concepts and structures in Bash shell scripting, let's dig into some examples. This will allow us to put these last few chapters to good use as shell scripts are the most commonly used tools in system engineers' daily jobs. Due to this, we are going to go through some shell scripts to emphasize the point of scripting – to make our lives a lot easier.

In this chapter, we're going to cover the following recipes:

  • Creating a file and folder inventory
  • Checking if you're running as root
  • Displaying server stats
  • Finding files by name, ownership, or content type and copying them to a specified directory
  • Parsing date and time data
  • Configuring the most common firewall settings interactively (firewalld and ufw)
  • Configuring network settings interactively (nmcli...
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