I am using ubuntu, yesterday i change username in my user account but now administration account locked, guest account opened, now i want my administration account how to retrieve the account i tried some other way but i am getting unable to change to root gid: Operation not permitted. My Убунту Версион 14.04.3
gksu gedit /etc/lightdm/lightdm.conf
allow-guest=true
к allow-guest=false
Ваша гостевая учетная запись должна теперь исчезнуть.