Re: dist upgrade nightmare!
- From: Chris Jones <cjns1989@xxxxxxxxx>
- Date: Wed, 15 Dec 2010 16:32:53 -0500
On Wed, Dec 15, 2010 at 10:32:42AM EST, Jude DaShiell wrote:
I tried taking a friend's machine from lenny to squeeze and it turned
into a disaster. As a consequence of the attempt his entire package
update and repair systems are broken. apt-get -f install can't fix
anything and dpkg --configure -a can't fix anything anymore and as
a consequence of those two acts, it's impossible to update his
system. I can't even downgrade back to lenny! What I would like to
know is if emergency procedures exist that can clear the mess out that
these operations created and get the system back to some known state.
I wouldn't mind this so much if the upgrade had simply failed but
a system breaking like this where even though useable with the
squeeze kernel on it is there nothing can be installed or uninstalled
with apt-get and aptitude apparently got turned into a zombi placed
in not fully installed or uninstalled or deferred status. If I had
done this to my own computer that would be one thing, but this is
a computer of a friend and I don't appreciate these tools for having
ended up leaving this kind of damage.
Hey Jude,
Sorry to hear about that.
Whether upgrading your own system or your friend's, the correct upgrade
procedure is as follows:
1. Clone your existing system to a new partition¹
2. Update your booloader so you have access the clone
2. Read the release notes, etc.
3. From the clone, run the update, upgrade, dist-upgrade procedure
4. Test the resulting system for a couple of days.
5. Delete the old system if you need to reclaim the disk space
In any case, there is _always_ a quick painless way to ‘downgrade back
to lenny’.. such as restoring from the full backup you made prior to
running the dist-upgrade.
As others have said, booting off a rescue disc and backing up anything
worth saving is still an option. Reinstalling and restoring the user
data shouldn't be difficult.
Cheers,
cj
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