Side note: when /var/lib/dbus/machine-id is a symlink to /etc/machine-id, a related issue issue is that systemd fails to create the later when missing:
https://bugs.launchpad.net/ubuntu/+source/dbus/+bug/1508697
Side note: when /var/lib/ dbus/machine- id is a symlink to /etc/machine-id, a related issue issue is that systemd fails to create the later when missing:
https:/ /bugs.launchpad .net/ubuntu/ +source/ dbus/+bug/ 1508697