Connecting remotely to f18 in single user mode

[Bruno Wolff III]

On Mon, Jan 07, 2013 at 16:46:06 +0100,
   Gianluca Cecchi <gianluca.cecchi at gmail.com> wrote:
>
>But it works instead for RHEL / CentOS versions 5.8 and 6.3 to connect this
>way as normal user, so I would expect similar behavior for Fedora too...
>Well, now I know that I can't ..

I forget the exact path, but there is a file named 'nologin' that includes 
a message to be displayed when non-root users aren't allowed to login. 
You can remove that file and normal users will be able to login again.