Ubuntu – Can not upgrade from 12.04 using update manager

12.04upgrade

Is there a special method to upgrade from 12.04 to 14.04?

When I try to upgrade from 12.04 using update-manager -d I receive the following error message:

fetching upgrade failed. 
There may be a problem with the server.

Am I missing any steps?
Does anybody have a solution for this?

Followed guidance on ubuntu website for upgrading to 14.04. I read it to say that each release after 12.04 had to be installed subsequent to installing next release to finally get 14.04 installed. Did not understand that un-supported releases are moved to a different server and are essentially unusable, hence the error message that I received.

Best Answer

This is a summary of what I've found. We've no idea what you've tried so far as troubleshooting so don't get upset if this is something you've already attempted.

  1. Visit HERE and generate the appropriate sources list. For your case, Your Country and Ubuntu 14.04 (the version you're trying to upgrade to)
  2. Open a terminal and type sudo gedit /etc/apt/sources.list. Replace the contents with your newly generated sources list.
  3. Run sudo apt-get update && sudo apt-get upgrade -y && update-manager -d
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