5

I would like to upgrade an Ubuntu system from 14.04 to 16.04. I ran the usually referenced command:

sudo update-manager -d

Which is strangely proposing to upgrade to 14.10:

enter image description here

If I then ask for the upgrade I get this error message:

enter image description here

How is it done exactly?

Luís de Sousa
  • 13,500

2 Answers2

8

Try:

  1. Edit the file /etc/update-manager/release-upgrades .
  2. Change the value of "Prompt" from "normal" to "lts".
  3. Then try sudo do-release-upgrade -d.

See if that works.

Luís de Sousa
  • 13,500
Ray
  • 2,200
-2

Failed to fetch

Fetching the upgrade failed. There may be a network problem

The message may indicate that you need to check your connection or the upgrade servers. They may be down for the moment. But it actually means that is trying to upgrade to 14.10, instead of 15.10 or 16.04 LTS, which is EOL and therefore the packages are missing on the server. I would suggest to open a bug report against ubuntu-release-upgrader-core or contact the Release team, as this shouldn't be the behavior of the upgrade manager.

Community
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Braiam
  • 69,112