Possible Duplicate:
What is the easiest way to resolve apt-get BADSIG GPG errors?
Reloading the package manager gives me an error:
W: GPG error: http://security.ubuntu.com oneiric-security Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://extras.ubuntu.com oneiric Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: GPG error: http://in.archive.ubuntu.com oneiric-backports Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures were invalid: BADSIG 73AD8184264CE9C6 Launchpad PPA for Simon Schneegans
W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C2518248EEA14886
W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/oneiric/Release
W: Some index files failed to download. They have been ignored, or old ones used instead.
What can I do about it?
