[K12OSN] Users not logging off causing server to max out.

["John P. Conlon" <jconlon1 elp rr com>]

We are using 3.1.2
We have discovered in our school that when our students just turn th 
epower off on the terminals the server keeps their services open.  Then 
the next day when a new batch of students comes in and logs on many of 
them get an error message that states that the server is full.

Is there a command line that can be entered by a root user at the end of 
the day that will close all users and if there is, what is it?

Can this command line be set up so that it is clock activated sometime 
during the night?

Thanks
Pat