1) Run the following command to get the "keys" sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 16126D3A3E5C1192
2) Run the above update commands again, make sure there is no error this time, and then check the update manager again. -- update-manager does not reports update time since install https://bugs.launchpad.net/bugs/656602 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