Upgrade 12.04 to 14.04 problems

[Petter Adsen]

On Sat, 23 Jan 2016 08:54:27 -0600
Jack McGee <jack at greendesk.net> wrote:

> I am trying to upgrade my desktop.
> First it did not find any new upgrades.
> So I edited
> 
> |/etc/update-manager/release-upgrades and changed |
> 
> 
> |Prompt=never to Prompt-normal now when I do upgrade I get:
> ||jmcgee at jmcgee-desktop:/etc/cups/ppd$ sudo
> nano /etc/update-manager/release-upgrades
> jmcgee at jmcgee-desktop:/etc/cups/ppd$ do-release-upgrade -d Checking
> for a new Ubuntu release Err Upgrade tool signature 404 Not Found
> [IP: 91.189.92.200 80] Err Upgrade tool 404 Not Found [IP:
> 91.189.92.200 80] Fetched 0 B in 0s (0 B/s) WARNING:root:file
> 'quantal.tar.gz.gpg' missing Failed to fetch Fetching the upgrade
> failed. There may be a network problem.
> jmcgee at jmcgee-desktop:/etc/cups/ppd$ |

You should change Prompt to 'lts' when upgrading from one LTS release
to another. Also, 'do-release-upgrade -d' attempts to upgrade to a
development snapshot, in this case Xenial. You probably want to try
without the '-d'.

Petter

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