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Date: Fri, 10 Dec 2010 00:46:57 -0600
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From: Adam Vande More <amvandemore@gmail.com>
To: Kevin Oberman <oberman@es.net>
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Subject: Re: /sbin/reboot
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On Fri, Dec 10, 2010 at 12:03 AM, Kevin Oberman <oberman@es.net> wrote:

> Unlike reboot, shutdown attempts to cleanly stop all processes. Things
> like databases can be badly damaged by a reboot. Other processes save
> state when stopped and that is lost with a reboot.
>

For the correct order, "shutdown -r" calls reboot which calls init which
calls rc.shutdown.

Doing a shutdown -r is the same as a reboot without the warning to logged in
users and shutdown handles the logging instead of reboot.

> Also, halt/reboot have options like -n and -q which can disrupt things
worse than an unintended clean reboot.

shutdown also give operator more possibilities than a clean shutdown some
which could be very bad.

-- 
Adam Vande More