禁止Ubuntu的guest登录

If you’re using the default LightDM in Ubuntu 11.10, edit /etc/lightdm/lightdm.conf so that it looks like this:

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

If you’re using GDM (which was the default in previous Ubuntu releases), uninstall gdm-guest-session.

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