It seems there is a problem with a file in /var/lib/apt/lists. You can safely delete all files in this folder as they are created when you apt- get update. Try:
sudo rm -rf /var/lib/apt/list/* sudo apt-get update -- update-manager is non-operational https://bugs.launchpad.net/bugs/381195 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
