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I installed ubuntu 13.10 and installed some software. Now I see two new users in the logon screen called daemon and postgres. How can this happen? Is there a way to remove these entries from logon screen without removing these two user roles (I think these two roles are essential for certain applications).

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indeed they're essential for certain services but if you just want to hide them, edit /etc/lightdm/users.conf file (the line that says hidden-users =) and append those users which you don't want to be shown.

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Thanks for your answer. I did it, but still problem persists :/ – Deepal Oct 27 '13 at 13:06
did you remove the # character. for example here's what it should be: hidden-users = user1 user2 user3 – V1R4N64R Oct 27 '13 at 14:33
That line was not commented @V1R4N64R – Deepal Oct 27 '13 at 18:47
i do remember a bug in lightdm which you couldn't hide the user from login screen. don't know if that was patched later or not. here's the reference to that. but go ahead and search for that. here's a topic about this: link. – V1R4N64R Oct 27 '13 at 20:31
Thank you :) @V1R4N64R – Deepal Oct 28 '13 at 7:08

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