Hi Sean,
> On the point of effectively cloning an Ubuntu or Debian instance in
> terms of the installed packages after a clean install, I have used
> this method in the past:
>
> - run the command 'dpkg âget-selections > ./selectionfile' on the
> machine to be cloned
> - when the base install has finished on the other machine copy the
> âselectionfileâ across to it (or stash it in your /home partition)
> - update the repositories according to your requirements and then run
> the command 'dpkg âset-selections < ./selectionfile && apt-get
> dselect-upgrade' on the new build
I was going to suggest something similar. It may be possible in theory
for the above to try and install a package that has deliberately been
dropped between releases, or has been superceded by something that
conflicts, I'm not sure.
A variation is to get a sorted list of installed packages before
upgrading,
aptitude search -F %p '~i' | sort >before
and again after, and then investigate the ones that were installed
before but not after to see whether they should be installed again.
comm -23 before after
Cheers,
Ralph.
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