/usr/share/dbus-1/services/org.Cinnamon.Slideshow.service is in cinnamon 3.6.7-8ubuntu1.
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=org.Cinnamon.Slideshow
Exec=/usr/bin/cinnamon-slideshow
|