Deny multiple login of the same user

[Matt Johnson]

>________________________________
> From: Valerio Pachera <sirio81 at gmail.com>
>To: Lista-edubuntu <edubuntu-users at lists.ubuntu.com> 
>Sent: Monday, 5 November 2012, 9:24
>Subject: Deny multiple login of the same user
> 
>Hi, how dow I deny the same user to log in multiple times?
>I do not whant to happen 'user01' access a client and, by mistake,
>another user enter with 'user01' to another client.
>


If you are using Edubuntu 12.04 for example (it also works in 10.04 and perhaps everything in between), you can add the following to your lts.conf:

LDM_LIMIT_ONE_SESSION = true

This will logout the first session if someone logs in with the same username somewhere else. I'm not certain if this is what you would like as it doesn't 'deny' the second login - instead, it logs out the first.

See http://manpages.ubuntu.com/manpages/precise/man5/lts.conf.5.html

--
Matt