Book Image

Bash Cookbook

By : Ron Brash, Ganesh Sanjiv Naik
Book Image

Bash Cookbook

By: Ron Brash, Ganesh Sanjiv Naik

Overview of this book

In Linux, one of the most commonly used and most powerful tools is the Bash shell. With its collection of engaging recipes, Bash Cookbook takes you through a series of exercises designed to teach you how to effectively use the Bash shell in order to create and execute your own scripts. The book starts by introducing you to the basics of using the Bash shell, also teaching you the fundamentals of generating any input from a command. With the help of a number of exercises, you will get to grips with the automation of daily tasks for sysadmins and power users. Once you have a hands-on understanding of the subject, you will move on to exploring more advanced projects that can solve real-world problems comprehensively on a Linux system. In addition to this, you will discover projects such as creating an application with a menu, beginning scripts on startup, parsing and displaying human-readable information, and executing remote commands with authentication using self-generated Secure Shell (SSH) keys. By the end of this book, you will have gained significant experience of solving real-world problems, from automating routine tasks to managing your systems and creating your own scripts.
Table of Contents (15 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

Chapter 7. Writing Bash to Win and Profit

In this chapter, we will introduce the following topics:

  • Creating a lame utility HTTP server
  • Parsing RSS feeds and output HTML
  • Scraping the web and collecting files
  • Making a simple IRC chat bot logger
  • Blocking IP addresses from failed SSH attempts
  • Playing and managing audio from Bash
  • Creating a simple NAT and DMZ firewall
  • Parsing a GitHub project and generate a report
  • Creating a poor man's incremental remote backup
  • Using Bash scripts to monitor udev input
  • Using Bash to monitor battery life and optimize it
  • Using chroot and Restricted Bash shells to secure scripts