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Possible Duplicate:
How do I upgrade from 11.04 to 11.10?

I'm trying to update my Ubuntu from 11.04 version. But when I open Update Center there is no mention about upgrade to 11.10. How can I upgrade?

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marked as duplicate by Bruno Pereira, Jorge Castro, jokerdino, htorque, Takkat Jan 28 '12 at 10:52

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

up vote 3 down vote accepted

Press Alt + F2 and run the following command:

update-manager -c

You should see a window similar to this:

enter image description here

Click on the 'Upgrade' button and start the upgrading process.

The update-manager manpage states that the parameter is for:

-c, --check-dist-upgrades
              Check if a new distribution release is available
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Start Update Manager and check that you have it set to display new versions of Ubuntu. Click 'Settings' and select 'For any new version' like shown below.

enter image description here

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