Failing on apt-get update

view story

http://unix.stackexchange.com – Very recently when I have been attempting to check for updates on my laptop (Ubuntu 12.04), the check fails. sudo apt-get update: W: GPG error: http://us.archive.ubuntu.com precise Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <[email protected]> W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise/main/i18n/Index No Hash entry in Release file /var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise_main_i18n_Index W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise/multiver (HowTos)