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I have a fresh install of Ubuntu 12.04. Whenever I try to download a new app from the Ubuntu Software Center, it says:

Requires unauthenticated packages

It then gives me an option to "Repair". When I click on "Repair", it starts "Updating cache" with the progress bar stuck at zero.

If I try download or install any package via terminal, it gets stuck at

connecting to

and I end up with the

something wicked happened...

error message.

I've tried changing the server from 'Software Sources' as mentioned in the troubleshooter. But that doesn't help and the problem persists.

share|improve this question

Check all the repositories from software sources and then update the software catalog using update manager. Then retry again.

If it doesn't work, try the following commands in a terminal:

sudo apt-get clean
sudo apt-get -f

And include the output of this command in the question.

share|improve this answer
I would also include a sudo apt-get update. – NlightNFotis Aug 12 '12 at 9:49

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