Book Image

Linux Shell Scripting Cookbook, Second Edition - Second Edition

Book Image

Linux Shell Scripting Cookbook, Second Edition - Second Edition

Overview of this book

The shell remains one of the most powerful tools on a computer system — yet a large number of users are unaware of how much one can accomplish with it. Using a combination of simple commands, we will see how to solve complex problems in day to day computer usage.Linux Shell Scripting Cookbook, Second Edition will take you through useful real-world recipes designed to make your daily life easy when working with the shell. The book shows the reader how to effectively use the shell to accomplish complex tasks with ease.The book discusses basics of using the shell, general commands and proceeds to show the reader how to use them to perform complex tasks with ease.Starting with the basics of the shell, we will learn simple commands with their usages allowing us to perform operations on files of different kind. The book then proceeds to explain text processing, web interaction and concludes with backups, monitoring and other sysadmin tasks.Linux Shell Scripting Cookbook, Second Edition serves as an excellent guide to solving day to day problems using the shell and few powerful commands together to create solutions.
Table of Contents (16 chapters)
Linux Shell Scripting Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Taking screenshots from the terminal


Taking screenshots is another common day-to-day activity for any computer user. It becomes even more important for administrators that maintain GUI applications running on computers and automate them. It is important to take screenshots when a particular event happens, to figure out what is going on in a GUI application.

Getting ready

We will be using a tool from the suite of programs called ImageMagick, which was used in the previous recipe as well. Install it using your package manager.

How to do it...

Let's get started with using the import command from ImageMagick to take screenshots:

  1. Take the screenshot of the whole screen:

    $ import -window root screenshot.png
    
  2. Manually select a region to take the screenshot:

    $ import screenshot.png
    
  3. Take a screenshot of a specific window:

    $ import -window window_id screenshot.png
    

    To find out window_id, run the command xwininfo and click on the window you want. Then pass this window_id to the -window option of import.x...