Failed to download repository information

Posted by Bob Van Elst on Ask Ubuntu See other posts from Ask Ubuntu or by Bob Van Elst
Published on 2012-10-07T15:55:16Z Indexed on 2012/10/13 21:53 UTC
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update-manager

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repository

When i clicked check this error message came up. But it does not come up when update manager strarts automatically. When you open update manager this error comes up. Any ideas on how to fix it?

Details: *W:GPG error: (http://ppa.launchpad.net precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY FC8CA6FE7B1FEC7C, W:Failed to fetch (http://ppa.launchpad.net/jonabeck/ppa/ubuntu/dists/precise/main/binary-amd64/Packages 404 Not Found , W:Failed to fetch (http://ppa.launchpad.net/jonabeck/ppa/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found , W:Failed to fetch (http://ppa.launchpad.net/jonabeck/ppa/ubuntu/dists/precide/main/source/Sources 404 Not Found , E:Some index files failed to download. They have been ignored, or old ones used instead.*

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