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When trying to upgrade from Ubuntu 10.10 to Ubuntu 11.04 I got this error during update

W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/natty/Release.gpg  Something wicked happened resolving 'us.archive.ubuntu.com:http' (-5 - No address associated with hostname)
, E:Some index files failed to download, they have been ignored, or old ones used instead.

I have no clue about computers.

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1 Answer 1

open update manager , click at settings . It will open a new window . In the window from Ubuntu software TAB at Download from , change your mirror to best server and try again .

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