How to turn off guest account in Ubuntu 12.04

 

After the installation of Ubuntu 12.04 LTS (Precise Pangolin) I have noticed that Canonical - unfortunately - hadn't given up the opportunity of loging on guest account introduced in Ubuntu 11.10 (Oneiric Ocelot).

 

ubuntu 12.04 guest account

 

The first thing I have done was to turn off this option, as I don't like the idea that any person without credential could log into my system.

 

Fortunately it can be done within few seconds.

 

Open terminal (ctrl+t) and execute following command:

 

sudo gedit /etc/lightdm/lightdm.conf

 

Original content of lightdm.conf file should looks like this:

 

[SeatDefaults]
user-session=ubuntu
greeter-session=unity-greeter

 

Enter: allow-guest=false to SeatDefaults section. Modified content should looks like below:

 

[SeatDefaults]
user-session=ubuntu
greeter-session=unity-greeter
allow-guest=false

 

Press ctrl+s to save. Now, you just have to restart your system to see the logon screen without guest account.

 

ubuntu 12.04 disabled guest account