Question

4

capture login screen-not sucssecful

rated 0 times [ 4] [ 0] / answers: 1 / hits: 4739 / 3 Years ago, tue, june 8, 2021, 12:10:43

I'm using Ubuntu 12.04 . If more information is needed, please tell me.
I Tried some guides to cature my login screen:

How can I take a screenshot of the login screen?

http://www.howtoforge.com/how-to-take-a-screenshot-of-your-login-screen

I tried the first one, but after running:

$ sudo bash /tmp/shot.sh >/tmp/shot.xwd

I'm getting this:

No protocol specified

No protocol specified    

xwd unable to open display ':0'

and i'm getting an xwd file in my tmp folder.
running the other commands giving errors.

tried the second one, after running:

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

I got:

No protocol specified

No protocol specified

import: unable to open X server ':0.0' @ error/import.c/ImportImageCommand/366

Many Thanks for helping (:

EDIT to vine_user:
here the output from the terminal-I cacked it from within the system while I'm looged in:

ubuntu@PrecisePangolin:~$ echo 'sleep 5; DISPLAY=:0 XAUTHORITY=/var/run/lightdm/root/$DISPLAYDISPLAY xwd -root' > /tmp/shot.sh

ubuntu@PrecisePangolin:~$ sudo bash /tmp/shot.sh >/tmp/shot.xwd

bash: /tmp/shot.xwd: Permission denied

ubuntu@PrecisePangolin:~$ sudo su

root@PrecisePangolin:/home/ubuntu#  sudo bash /tmp/shot.sh >/tmp/shot.xwd

No protocol specified

No protocol specified

xwd:  unable to open display ':0'

root@PrecisePangolin:/home/ubuntu#

EDIT 2!: HERE IT IS!:
enter image description here

just uploading-this uploadong site is better than other iuset to use (: :
enter image description here

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1 Year ago

answered 3 Years ago naldis · Accepted Answer

Step1:

Make /tmp/shot.sh using this command:

echo 'sleep 20; DISPLAY=:0 XAUTHORITY=/var/run/lightdm/root/$DISPLAY xwd -root' > /tmp/shot.sh

You may change the seconds of sleep suitably.

Step2:

Login to the text mode by pressing Ctrl+Alt+F1.

Step3:

Execute this command;

 sudo bash /tmp/shot.sh >/tmp/shot.xwd

Step4:

Return to the GUI mode by pressing Ctrl+Alt+F7.

Step5:

Logout by normal way. While you can see login screen, wait for some seconds.

Step6:

Login by normal way. And execute this command in terminal;

convert /tmp/shot.xwd /tmp/shot.png

(you need to install imagemagick, if you don't have installed it yet)

So, you can check the picture using this command;

eog /tmp/shot.png

Reference: http://ptspts.blogspot.jp/2010/02/how-to-create-screen-shot-of-gdm-login.html

In 12.04, it differs in using lightdm.