I would add: the current Ubuntu help page (yes, it's a community one, but nothing official exists AFAIK) for SecureApt, as well as the Debian one, advertise a gpg feature which doesn't work anymore in Yakkety:
https://help.ubuntu.com/community/SecureApt https://wiki.debian.org/SecureApt -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apt in Ubuntu. https://bugs.launchpad.net/bugs/1634464 Title: cloudimg apt missing dirmngr Status in apt package in Ubuntu: Invalid Bug description: apt-key adv --keyserver keyserver.ubuntu.com --recv 9FD3B784BC1C6FC31A8A0A1C1655A0AB68576280 Warning: apt-key output should not be parsed (stdout is not a terminal) Executing: /tmp/tmp.Qv81Vl3Idi/gpg.1.sh --keyserver keyserver.ubuntu.com --recv 9FD3B784BC1C6FC31A8A0A1C1655A0AB68576280 gpg: failed to start the dirmngr '/usr/bin/dirmngr': No such file or directory gpg: connecting dirmngr at '/tmp/tmp.Qv81Vl3Idi/S.dirmngr' failed: No such file or directory gpg: keyserver receive failed: No dirmngr To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1634464/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp