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Title: ubuntu 18.04 apt-get update key error the public key is not available: NO_PUBKEY 40976EAF437D05B5 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1814803/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs