/usr/share/dbus-1/services/unity-scope-diodon.service is in unity-scope-diodon 1.3.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [D-BUS Service]
Name=net.launchpad.Diodon.Unity.Scope.Clipboard
Exec=/usr/lib/x86_64-linux-gnu/diodon/unity-scope-diodon
|