How To Take A Screenshot Of Your Login Screen

Version 1.0
Author: Falko Timme
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Normally you use a screenshot tool to take screenshots of your Linux desktop. Unfortunately, this doesn't work if you want to take a screenshot of your login prompt. This tutorial explains how you can take a screenshot of your Linux desktop login screen nevertheless.

I do not issue any guarantee that this will work for you!

 

1 Find Out The Virtual Terminal (VT) Of The Login Screen

First, log out of your desktop session so that you get to the login screen:

Now press CTRL + ALT + F1 to get to a command prompt:

While you are at the command prompt, type CTRL + ALT + F8 or CTRL + ALT + F7 to get back to the login screen - usually it is at CTRL + ALT + F8 which means your VT is 8. (It is possible that it is located at another VT - if you don't find it at 7 or 8, please try your other F keys).

 

2 Taking The Screenshot

Now that you know the number of the VT of the login screen, go back to the command prompt (CTRL + ALT + F1) and log in. We need to have the packages imagemagick and xnest installed; on Ubuntu, we can install them as follows:

sudo apt-get install imagemagick xnest

Now make sure you have root privileges - on Ubuntu you can achieve this by typing

sudo su

We can now take the screenshot with this command:

chvt 8; sleep 5; XAUTHORITY=/var/gdm/:0.Xauth DISPLAY=:0.0 import -window root /tmp/gdm-login-shot.png

Make sure you use the correct VT of the login screen in the chvt command (if your VT is 7, use chvt 7; instead).

This command will switch to your login screen automatically and take a screenshot. Log into your desktop and open a file browser. You should find your login screenshot in /tmp/gdm-login-shot.png.

Falko Timme

About Falko Timme

Falko Timme is an experienced Linux administrator and founder of Timme Hosting, a leading nginx business hosting company in Germany. He is one of the most active authors on HowtoForge since 2005 and one of the core developers of ISPConfig since 2000. He has also contributed to the O'Reilly book "Linux System Administration".

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By: An Arch Guy

Save all the trouble. simply install SLiM. Pressing F11 gives you a screenshot of the login screen.

By: borderamigos

On my Debian box I just press PrtScrn and it does a screen capture.

By: Anonymous

Sorry, I fail to see how installing an entirely new Login Manager is "saving all the trouble".

By: istok

i know ubuntu users who take photos of their login screen with their phone cameras.

true story.

 

 

 

By: Anonymous

This is what I was looking for when I wrote my article about switching between Unity and GNOME. http://linuxblog.darkduck.com/2011/05/4-terribly-easy-steps-to-move-away-from.html

By: Anonymous

Hey, i use ubuntu 12.04, and get the following error :

No protocol specified
No protocol specified
import: unable to open X server `:0.0' @ error/import.c/ImportImageCommand/366

 Could you please help me out with this?

By: AndyLevy

GREAT!  I've been trying to take a screenshot of my log-in screen in Red Hat Enterprise Linux 7.1 for a while now and THIS finally did it. Thanks!!