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Possible Duplicate:
How do I upgrade from 10.04 or 11.10 to 12.04?

I am running Ubuntu 10.04 and I am very interested in upgrading to the new 12.04, but my update manager won't recognize that the new version is out apparently because when I run it.. all it says is that the newest version is 10.10 and that it isn't supported.... I am fairly new to using Linux Ubuntu OS and already I love the freedom I get from it.. I would greatly appreciate it if you at Ubuntu could help me make the most of my experience.. Please help me understand why I can't automatically upgrade to 12.04 or atleast 11.10.

Thank You for your time in reading this,

-Joshua Mason

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marked as duplicate by fossfreedom Jun 16 '12 at 10:37

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

Just press Alt+F2 on your keyboard and type in update-manager -d

and follow the instructions, or

Just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the commands below.

sudo apt-get update && sudo apt-get upgrade

Then use update manager to check for updates

For complete details on how to upgrade to Ubuntu 12.04 Precise Pangolin from 10.04, 11.04, 11.10, See this site

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