Date: Thu, 17 Aug 2006 14:21:30 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Ceri Davies <ceri@submonkey.net>, Jerry McAllister <jerrymc@clunix.cl.msu.edu>, danger@rulez.sk, questions@freebsd.org Subject: Re: Wilfully dirtying a filesystem Message-ID: <20060817192129.GA30450@dan.emsphone.com> In-Reply-To: <20060817191142.GK89500@submonkey.net> References: <1704275870.20060817201511@rulez.sk> <200608171858.k7HIw3fP015972@clunix.cl.msu.edu> <20060817191142.GK89500@submonkey.net>
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In the last episode (Aug 17), Ceri Davies said: > On Thu, Aug 17, 2006 at 02:58:03PM -0400, Jerry McAllister wrote: > > > Thursday, August 17, 2006, 6:55:08 PM, Ceri wrote: > > > > I have a system on which /usr is slightly hosed, but not badly enough > > > > for it to fail a preen fsck. > > > > > > > > I cannot easily get to single-user on this machine, so is there > > > > a good way for me to dirty the filesystem just enough to force > > > > "fsck -p" to fail (yanking power also difficult)? "umount -f > > > > /usr; reboot" doesn't seem to work... > > > > Is 'fsck -f' not a possibility? > > No, because I can't unmount /usr. What kind of setup do you have where you can't get to single-user mode, but you apparently want fsck -p to fail (which will put you in single-user mode)? If you have a serial console that doesn't kick in until after the kernel is initialized, just hitting ^\ a couple times during the bootup sequence should get you your "Enter pathname of shell" single-user prompt. You could also put an "exit 1" at the top of /etc/rc and reboot; just make sure to remove it when you want to continue to multiuser mode :) -- Dan Nelson dnelson@allantgroup.com
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