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Date: Sat, 09 Jun 2012 20:42:11 +0700
From: Adam Strohl <adams-freebsd@ateamsystems.com>
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To: Sami Halabi <sodynet1@gmail.com>
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Cc: freebsd-stable@freebsd.org
Subject: Re: su problem
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On 6/9/2012 20:33, Sami Halabi wrote:
> its the same as /var/log/messages

I assume you mean there is nothing there because it's not the same thing 
(yes dmesg stuff should get logged into syslog but your system obviously 
isn't working right so ...).

Past that I've been skimming this thread since you posted and I can't 
think of anything here that would resolve this except that it might be 
worth a try to have someone ctrl-alt-del it (requires no FreeBSD 
knowledge, passwords, etc by the person doing it and should gracefully 
reboot the server).   Its a total Hail Mary [pass] though [and probably 
won't work].

It might lock you out entirely, too.

P.S.
Beyond this incident obviously setting up a remote console is ideal, 
IPMI is very worth it, but my guess is you'd have it setup if your MB 
had it.  If you don't have an IPMI module and you happen to have another 
box there cross-patching their serial consoles to each other so if one 
goes down you can serial via the other one (ie; server1's com1 to 
server2's com2, and server2's com1 to server1's com2).  You need to set 
this up as root though so no help now.

--
Adam Strohl
http://www.ateamsystems.com/