Ubuntu server and power off

[Frank]

On Mon, 2012-05-07 at 09:31 +0200, Antonio Fernández Pérez wrote:

> If the machine will be shutdown by power button, what effects could to
> have? 

If by "shutdown by power button" you mean "press and hold the power
button until the PC is turned off" (the equivalent of "brutally pulling
the plug", that's probably not a good idea. According to Murphy's Law,
sooner or later some problems on the hard disk can appear, especially if
the power-off happen while there is data to be written on the disk.

You can install ACPI (sudo apt-get install acpid). Your server will
detect when the power button is pressed and it will shutdown gracefully
and correctly your server.

Check google -> "ubuntu server shutdown on power button".