Howto fix W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures were invalid: BADSIG C2518248EEA14886 Launchpad?

January 20, 2012

Today I ran into the problem that my Ubuntu 11.10 (Oneiric) show following error message while trying apt-get update:


Fetched 16.3 MB in 34s (473 kB/s)

Reading package lists... Done
W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures were invalid: BADSIG C2518248EEA14886 Launchpad VLC
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

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.


I did following to fix it. Maybe it helps you too.

apt-get clean
cd /var/lib/apt
mv lists lists.old
mkdir -p lists/partial
apt-get clean
apt-get update