[Ubuntugnome-qa] reliable apt-get with unreliable internet connection

[Patrik Nilsson <nipatriknilsson@xxxxxxxxx>]

Hi All,

I tried to upgrade Ubuntu Gnome from 13.10 to 14.04 and ran into
problems directly while using an unreliable Internet connection. The
connection works well for one minute then it disappears and appears again.

====
sudo apt-get update
[...]
W: GPG error: http://se.archive.ubuntu.com saucy-updates Release: The
following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu
Archive Automatic Signing Key <ftpmaster@xxxxxxxxxx>
====

This is since it took very long time to download index files and they
changed content. I made several "apt-get update" attempts. After
deleting "/var/lib/apt/lists/*" I could issue another apt-get update.
Still no success of downloading all index files.

Is there a reliable way of downloading index files with "apt-get update"?

Is there a reliable way of later doing "apt-get (dist-)upgrade"?
Downloading all packages!

... and of course: Is there a reliable way of upgrading to Ubuntu Gnome
14.04 beta? Downloading all packages!

Best regards,
Patrik

-- 
PGP-key fingerprint: 1B30 7F61 AF9E 538A FCD6  2BE7 CED7 B0E4 3BF9 8D6C