Question

How upgrade 12.04 LTS to 14.04 LTS ?

Posted April 24, 2014 4.1k views
What the right way to upgrade ubuntu 12.04 to 14.04 in DO Droplets ? do-release-upgrade ?

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2 answers
do-release-upgrade will work but not until 14.04.1 is available in July.

From the Ubuntu mailing list "Users of 12.04 LTS will be
offered the automatic upgrade when 14.04.1 LTS is released, which is
scheduled for July 24th."

https://lists.ubuntu.com/archives/ubuntu-announce/2014-April/000182.html
If you really want to upgrade now, supply -d (development version) option.
sudo do-release-upgrade -d
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