I want to upgrade from Ubuntu 10.10 to 11.04. When I start upgrading, a window appeared with the following message:

authentication failed there may be a problem with the network or with a server

Please guide me on how can I resolve this problem.


Try this(not best way to solve this problem but it is working):

Download Ubuntu 11.04 and make LiveCD on pendrive or cd/dvd.

Boot LiveCD.

Use "upgrade Ubuntu" in options.

  • This method works very well, and will resolve problems identified. – david6 Jul 27 '12 at 23:35

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.