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I want to perform an upgrade from 14.04 to 15.04. When I run "sudo update-manager -d" I get "... However, Ubunutu 16.04 LTS is now available(you have 14.04)" I think that this nighly build 16.04 is not yet stable. How to upgrade to 15.04 and not 16.04?

Morsi Chaari
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1 Answers1

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Use update manager without the "-d" option. See man update manager for details.

The -d option means update to development release.

-d, --devel-release Check if upgrading to the latest devel release is possible

http://manpages.ubuntu.com/manpages/precise/en/man8/update-manager.8.html

or run 

sudo do-release-upgrade

See How to Upgrade from 14.10 to 15.04

Community
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Panther
  • 102,067
  • without -d I got "The software on this computer is up to date" – Morsi Chaari Dec 30 '15 at 12:44
  • result of "sudo do-release-upgrade" : "Checking for a new Ubuntu release No new release found" – Morsi Chaari Dec 30 '15 at 12:44
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    OIC, 14.10 is beyond end of life and you can not skip releases, so you can not either upgrade 14.04 -> 14.10 -> 15.04 nor can you 14.04 -> 15.04. My advice is for you to do a fresh install of 15.04 , faster and more reliable. – Panther Dec 30 '15 at 12:48