[CentOS] Display a warning message at a certain time ?

[Per Qvindesland]

Hi

Not sure but I seem to remember the old write command it could to the
trick.

Regards
Per
On Tue, 2010-02-02 at 21:47 +0100, Niki Kovacs wrote:
> Hi,
> 
> I'm currently installing a CentOS 5 desktop as a public internet access 
> point. The machine shuts down every day automatically at 22:30. Is there 
> a way I can display a message in GNOME at 22:15 warning the user that 
> the machine will shutdown in 15 minutes ?
> 
> Any suggestions ?
> 
> Niki Kovacs
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