[ad#ad-1]I am using Ubuntu 10.04 Lucid Lynx Beta 1 and got the following set of warnings while updating my package lists
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: http://archive.ubuntu.com lucid Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/lucid/Release W: Some index files failed to download, they have been ignored, or old ones used instead.
This was preventing the package list updates and hence preventing package updates. I don’t know what caused this or when exactly I started to get these, but I guess it was after I changed my packages server from np.archive.ubuntu.com to archive.ubuntu.com.
Anyways, I managed to fix it by (re)moving all the old package lists and updating again. This can be summed up in the following three lines of terminal commands:
sudo mv /var/lib/apt/lists /var/lib/apt/lists.old sudo mkdir -p /var/lib/apt/lists/partial sudo apt-get update
This did it for me. Hope it does it for you too.