Ubuntu - How to Disable Guest Account in 12.04 and 12.10
Submitted by ingram on Sat, 01/19/2013 - 12:11am



In some situations, a guest account is useful, but most likely you will want to disable it to prevent people from using your computer without a password. There isn't a graphical way to do disable it. You must edit the lightdm.conf file to disable it.
Press Alt + F2 to open the run box and type in this:
gksudo gedit /etc/lightdm/lightdm.conf
Add the following line to the bottom of the file and save it:
allow-guest=false
Restart your computer and you will no longer be able to login as guest. To re-enable the guest account, just remove the line you added from the lightdm.conf file.
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