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I'm unable to upgrade to 13.04. I've tried the "sudo do-release upgrade" and the "sudo release -d" and i'm still not getting any messages from my update manager saying that 13.04 is available.

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marked as duplicate by Mitch, Eric Carvalho, Radu Rădeanu, Basharat Sialvi, Kevin Bowen Jun 1 '13 at 14:42

This question was marked as an exact duplicate of an existing question.

In the Terminal, type in

sudo do-release-upgrade

This will tell you if a new OS is available.

In Terminal type:

sudo apt-get update && sudo apt-get dist-upgrade
sudo update-manager -d

Then follow the instructions to upgrade

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