Oh and various repositories have been configured without a key, possibly the files they use have been deleted, that is keys in /etc/apt/trusted.gpg.d or /etx/apt/trusted.gpg
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2073709 Title: issue upgrade ubuntu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/2073709/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs