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From: John Baldwin <jhb@freebsd.org>
To: freebsd-hackers@freebsd.org
Subject: Re: Failsafe on kernel panic
Date: Wed, 16 Jan 2013 15:13:26 -0500
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 (bigwig.baldwin.cx); Wed, 16 Jan 2013 15:13:28 -0500 (EST)
Cc: freebsd-stable@freebsd.org, Sami Halabi <sodynet1@gmail.com>
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On Wednesday, January 16, 2013 2:25:33 pm Sami Halabi wrote:
> Hi everyone,
> I have a production box, in which I want to install new kernel without any
> remotd kvn.
> my problem is its 2 hours away, and if a kernel panic occurs I got a
> problem.
> I woner if I can seg failsafe script to load the old kernel in case of
> psnic.

man nextboot (if you are using UFS)

-- 
John Baldwin