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Date: Sun, 31 Aug 2008 11:12:41 +0200 (CEST)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: tethys ocean <tethys.ocean@gmail.com>
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Cc: freebsd-security@freebsd.org, freebsd-questions@freebsd.org
Subject: Re: jail stop extracting iso file
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In server jail and squid is running on it  as lots of another packet. i want
to extract iso image in this server.  But i havent do it.

#mdconfig -a -t vnode -f big_bcbcv.iso
#mdconfig: open(/dev/mdctl): No such file or directory

you can't

jail doesn't allow it.