I have just upgraded to 16.04 LTS but I now just get a terminal screen with the following message :

Welcome to Ubuntu 16.04.1 LTS (GNU/Linux 4.2.0-42-generic x86_64)
Documentation: https...
Management: https...
Support: https...

To run a command as administrator (user "root"), use "sudo " See "man sudo_root" for details."

But I don't know which command is needed to launch ubuntu from this point.

Can anybody help ?

  • 1
    Did you install the server or desktop version? The command to start the x server is startx but you should not need to do that as Ubuntu desktop has a display manager by default.
    – Zanna
    Aug 28, 2016 at 13:16
  • 1
    I think your upgrade failed and stuck at some point. Did you try switching to vt7 b y Ctrl-Alt-F7?
    – Anwar
    Aug 28, 2016 at 13:18
  • Thanks Zanna. I'm pretty sure I installed the desktop version. Should I try to startx command anyway?
    – Mons
    Aug 28, 2016 at 13:19
  • @Anwar Thanks. No, I didn't. Should I try that now?
    – Mons
    Aug 28, 2016 at 13:20
  • Yes. You should try it
    – Anwar
    Aug 28, 2016 at 13:21

1 Answer 1


I think somehow your upgrade went wrong. Try switching to Virtual Termnal 7 by Ctrl-Alt-F7 and there you'll see the login screen.

If you can't see that login screen, use startx (after going back to VT1 pressing Ctrl-Alt-F1) to start the graphical session. If the graphical session starts, install a display manager which should handle the login prompts automatically after each reboot now.

sudo apt install lightdm

If that too doesn't work, install lightdm from the VT1 (where you originally were) using the above command sudo apt-get install lightdm and reboot with sudo reboot.

It should solve the problem.

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