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I had one problem in my PC much time before this happen, my PC was formatted and the Ubuntu system was reinstalled by computer mechanic, now my PC work normally, but, when my PC start, happen the system go only to the workspace, that is bad, because somebody can access my person workspace without know my password. Does somebody know to enable the login screen to appear during the system starting, or the automatic login screen? Whatever.

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  • It's usual to indicate what steps you have already taken before posting a question. itsfoss.com/ubuntu-automatic-logon
    – graham
    Mar 31, 2021 at 20:21
  • Ok, I don't find this option, can be because of Ubuntu version are different. You or somebody can to find or talk another solution that can be made on terminal too
    – Eduardo Bernal
    Mar 31, 2021 at 20:53
  • What version then?
    – Levente
    Mar 31, 2021 at 22:12
  • Version 20.04 LTS. But, please wait When I am offline
    – Eduardo Bernal
    Mar 31, 2021 at 23:15

1 Answer 1

Reset to default
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With the graphical interface

In "Settings", go to the "Users" tab. In the top right corner of the dialog, you first need to hit "unlock" and enter your user password, because changing the setting can only be performed by a user that has administrator privileges (sudo rights). After unlocking the settings, you can change the slider next to "Automatic login" to off. Next time you boot the computer, you will see the login screen first.

If you do not have administrator privileges on that computer, you will need to ask a user that has (i.e., a user with administrator rights) to change this setting for you.

Using the terminal Open the configuration file "/etc/gdm3/custom.conf" in a text editor with root priviledges:

sudoedit /etc/gdm3/custom.conf

Comment the lines that allow a user to automatically log in out by placing a comment mark # in front of the line, so it looks like

#  AutomaticLoginEnable = true
#  AutomaticLogin = user1

After AutomaticLogin, you will find the actual login of your user rather than user1. You may also delete these lines.

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  • Thanks, but, do you know how to do the user to be an administrator user? Because I don't know How to do; or you can answer: do you know if it has an option equivalent on terminal?
    – Eduardo Bernal
    Apr 1, 2021 at 15:45
  • First user created when installing the system has administrator power, so can unlock that screen with his/her normal user password. See additions for how to do this from the terminal.
    – vanadium
    Apr 1, 2021 at 15:50
  • Ok, too bad I have I only have an administrator user When I install the system with correct configuration. I think better I resolve this problem on terminal, because the command sudo can be very useful for this problem
    – Eduardo Bernal
    Apr 1, 2021 at 16:03
  • Thanks for help, really resolve the problem in the terminal is more effective, I mean, this helped me to resolve the problem. I don't know why only add one character resolved the problem, because in Automatic Login, the value was user instead of user1, very strange, but, resolved the problem the same so, thanks
    – Eduardo Bernal
    Apr 8, 2021 at 22:48

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