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Re: Upgrading kernel on a system that won't boot



On Thu, Feb 12, 2009 at 06:16:32PM -0500, Dan Christensen wrote:
> Michael Pobega <pobega@gmail.com> writes:
> 
> > What I would do is put a live system on a USB flash drive (System Rescue
> > CD is what I usually use) and mount the unbootable hard drive from
> > within the live system. At that point you could wget a kernel deb from
> > http://ftp.uk.debian.org onto your old mounted hard drive. chroot into
> > your drive's mount point, dpkg -i linux-image-*, and you're done; your
> > system should now be bootable.
> 
> Thanks, I suspected that that would be a reasonable plan, and I've just
> checked that this doesn't seem to require upgrades to user space.
> 
> Now one thing about my system is that mounting /usr will be a bit
> awkward, since it is lvm over several raid 5 devices.  Can anyone think
> of a way to install a kernel .deb without having /usr mounted?  If I
> just unpack it with dpkg-deb, copy the kernel, initrd and modules dir
> to the right place, and update grub, will that be enough??
> 
> Thanks,
> 
> Dan
> 

Run from a LiveCD and use dpkg with the --root option. Read dpkg(1) for
more information.

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