/usr/share/dbus-1/system-services/com.canonical.SystemImage.service is in system-image-dbus 3.1+16.04.20160407-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [D-BUS Service]
Name=com.canonical.SystemImage
Exec=/usr/sbin/system-image-dbus
User=root
|