The following details are provided:
--
W: GPG error: http://ppa.launchpad.net intrepid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 632D16BB0C713DA6
W: GPG error: http://ppa.launchpad.net intrepid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 4874D3686E80C6B7
W: GPG error: http://ppa.launchpad.net intrepid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 28A8205077558DD0
i get this error:
An error occurred
The following details are provided: ppa.launchpad. net intrepid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 632D16BB0C713DA6 ppa.launchpad. net intrepid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 4874D3686E80C6B7 ppa.launchpad. net intrepid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 28A8205077558DD0
--
W: GPG error: http://
W: GPG error: http://
W: GPG error: http://