Failed ubuntu do-release-upgrade work around?

[Bruce Labitt]

I'm trying, without much success, to dist-upgrade a machine from 10.04LTS
to 12.04.2LTS.  The installer seems to timeout because the host (or my
network) is not responding.  What is puzzling, is that I can wget the file
from the repository.  The download seems to take > 3 minutes to start, (no
wget activity) but then the connection is good for a while, stalls, but
eventually picks up and completes.  When the connection is active, I seem
to have reasonable BW, otherwise I have 8B/sec or 0B/sec download.  It is
probably our network $WORK, but I have yet to have anyone be able to help
me.

Since I have the file in question, where can I stuff this file, so that the
installer sees it, and doesn't have to go to the slow repo to get it
again.  I think the dist-upgrade saves stuff in /var/log/dist-upgrade

In main.log the last entries are:

2013-05-03 10:31:40,603 ERROR IOError in cache.commit(): 'Failed to fetch
http://archive.ubuntu.com/ubuntu/pool/main/t/texlive-extra/texlive-fonts-extra_2009-10ubuntu1_all.debConnection
failed
'. Retrying (currentTry: 2)
2013-05-03 10:31:40,603 ERROR giving up on fetching after maximum retries

Does anyone know where the files are saved for a dist-upgrade that hasn't
finished?
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