Atualização 11.04 - W:GPG error: - Como resolver?

[mkleber]

W:GPG error: http://ppa.launchpad.net natty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5A2891C745C75F37, W:Failed to fetch http://archive.canonical.com/ubuntu/dists/natty/partner/source/Sources  401  Unauthorized
, W:Failed to fetch http://archive.canonical.com/ubuntu/dists/natty/partner/binary-i386/Packages  401  Unauthorized
, E:Some index files failed to download. They have been ignored, or old ones used instead.

[Andreson Goveia]

W:GPG error: http://ppa.launchpad.net natty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5A2891C745C75F37, W:Failed to fetch http://archive.canonical.com/ubuntu/dists/natty/partner/source/Sources  401  Unauthorized
, W:Failed to fetch http://archive.canonical.com/ubuntu/dists/natty/partner/binary-i386/Packages  401  Unauthorized
, E:Some index files failed to download. They have been ignored, or old ones used instead.

terminal

$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 45C75F37 && sudo apt-get update

[mkleber]

W:GPG error: http://ppa.launchpad.net natty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5A2891C745C75F37, W:Failed to fetch http://archive.canonical.com/ubuntu/dists/natty/partner/source/Sources  401  Unauthorized
, W:Failed to fetch http://archive.canonical.com/ubuntu/dists/natty/partner/binary-i386/Packages  401  Unauthorized
, E:Some index files failed to download. They have been ignored, or old ones used instead.

terminal

$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 45C75F37 && sudo apt-get update

TKS !