How to take Screenshot in Linux

A picture is worth a thousand words , when you need to document anything . in microsoft window its the one of simple thing we can do .
there are many ways and utilities through which a screen shot can be taken in Linux . In this Blog we are sharing simple way to take Screenshot .

From the Command Line

One of the simplest and most universal ways to take a screenshot is with the import command from the ImageMagick suite of utilities. This is a very common tool, and chances are that ImageMagick is already installed by your distribution; if not, packages should be readily available. import has two major screenshot modes. To take a picture of the entire screen, type:

$ import -window root
screenshot.png

The -window root argument tells import to take a picture of the entire screen. If you type:

$ import
screenshot.png

Your cursor turns into crosshairs, allowing you to drag across the section of screen you want to copy. Once you release the mouse button, the part of the screen that is selected becomes the part import will put into your image. import supports all common image formats used for screenshots, including JPEG, PNG, and BMP (useful for lossless screenshots). All you have to do is name your output file with the file extension you want—import will figure out the rest.

If you want to set a time delay so you can arrange your windows or possibly hide the terminal containing the import command, just preface your import command with sleep. To allow five seconds before a screenshot is taken, type:

$ sleep 5; import -window root
screenshot.png

From Within GNOME

GNOME uses its own screenshot program called gnome-panel-screenshot. This program can be accessed a number of ways, but probably the easiest is to press the Print Screen key on your keyboard. This immediately takes a screenshot of the entire screen and displays a dialog you can use to name and save the screenshot file. To take a picture of the current window, just press Alt–Print Screen instead. This program is also accessible in the panel menu. Click Actions → Take Screenshot. You can even access this program directly from the command line with:

$ gnome-panel-screenshot --delay 5

This command causes GNOME to pause five seconds before taking a screenshot. GNOME then presents you with a dialog so you can choose the filename to save to.

From Within KDE

If you use the KDE desktop, ksnapshot is the KDE alternative to gnome-panel-screenshot and can usually be found within the K Menu → Graphics menu. The GUI allows you to choose a delay, take a screenshot, and choose whether to take the screenshot of the entire desktop or just the current window. You can, of course, also start ksnapshot just by typing ksnapshot in a terminal window or in the Run Command window, which you can access by pressing Alt-F2.