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I'm currently using ubuntu 10.10 and I can not upgrade ubuntu 11.04 on my dell inspiron N5040.An error report comes up stating " Authenticating the upgrade failed. There may be a problem with the network or with the server. "

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Please edit your question to add some information: What version of Ubuntu are you currently running, is your Ubuntu system 32-bit or 64-bit, and what is the full and exact text of the error message? Also, please go ahead and follow these instructions, which may fix your problem--if that does not fix your problem, then please edit your question to include all the information obtained, including all the text from the Terminal. (You don't need to post a new question on Launchpad, since you've already posted here.) –  Eliah Kagan Apr 18 '12 at 15:32
    
This question appears to be abandoned, if you are experiencing a similar issue please ask a new question with details pertaining to your problem. If you feel this question is not abandoned, please flag the question explaining that. :) –  Seth Dec 29 '12 at 4:18
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closed as too localized by Eliah Kagan, fossfreedom Dec 29 '12 at 7:21

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Well not an expert here, but 10.10 is at it's End OF Life(EOL) and i'm not sure if canonical supports upgrading from a unsupported version. I hope this link helps https://help.ubuntu.com/community/NattyUpgrades

I would try the Upgrading Using the Alternate CD/DVD method on that page.

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Download a live CD and boot from it. It will give you the option to upgrade previous ubuntu install. This way you can directly upgrade to 12.04 (which will be final in a week).

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