Today I resumed my Linux laptop, after trying hard to use OSX for work...
Got this when updating the packages, after some weeks of abandon:
W: GPG error: jaunty Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: jaunty-updates Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: jaunty-security Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key
W: GPG error: jaunty Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key
W: Failed to fetch /ubuntu/dists/jaunty-updates/Release
W: Failed to fetch /ubuntu/dists/jaunty-security/Release
W: Some index files failed to download, they have been ignored, or old ones used instead.
W: You may want to run apt-get update to correct these problems
How to fix:
apt-get clean
cd /var/lib/apt
mv lists lists.old
mkdir -p lists/partial
apt-get clean
apt-get update
