Rollback instead of completing dpkg-configure -a?

[mfpompadour]

On a new VPS, aptitude dist-upgrade hangs during /usr/sbin/grub

Now, aptitude is in a bad state:

dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.

I can't successfully complete this command, because of /usr/sbin/grub hanging.

Can I rollback instead?

(This is on 12.04)

[Mark Phelps]

If by "rollback" you mean restore your setup to an earlier date, sorry, there is no such capability in Ubuntu.