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I am using Ubuntu 13.10 32-bit. I am using terminal mode to test a Window Manager.

I know I can use Ctrl+Alt+F1 to go to terminal mode from the GUI mode. But there is still graphical desktop running in background.

Is there a command to move from CLI to GUI mode so that I can access that GUI?

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use Ctrl+Alt+F7 to return. –  souravc Jan 11 '14 at 4:30

4 Answers 4

you can either :

press ctrl+alt+F7


run the command startx

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To check your default display manager (DM):

cat /etc/X11/default-display-manager

To check if the display manager is running:

ps cax | grep display_manager

e.g.: if it's lightdm:

ps cax | grep lightdm

(you can then follow up with echo $? command, an output 0(zero) indicate its running or otherwise.)

To start a DM:

sudo start display_manager


sudo start lightdm

To stop a DM:

sudo stop display_manager


sudo stop lightdm

To restart a DM:

sudo restart display_manager


sudo restart lightdm
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Try this command on virtual console,

sudo service $(cat /etc/X11/default-display-manager | awk '{print substr($1,11)}' ) restart
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I'd like to know more about this- how does it work? Could you edit your answer to break down the different parts of this line? –  Michael Hoffmann Aug 23 at 7:25
@MichaelHoffmann create a chat room and ping me from that. I'll explain.. –  Avinash Raj Aug 23 at 8:43

the best way to test window manager safely is to use Xephyr. see man pages for more details.

I assume you use gnome-terminal here.

  1. start Xephyr
    $ Xephyr :1
  2. Ctrl+Shitf+T open a new tab
    $ export DISPLAY=:1
    $ type_your_window_manager_command_here

Now you can play with your window manager in the Xephyr window.

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