/usr/share/dbus-1/system-services/org.kde.kcontrol.kcmremotewidgets.service is in kde-runtime-data 4:17.08.3-0ubuntu1.
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=org.kde.kcontrol.kcmremotewidgets
Exec=/usr/lib/kde4/libexec/kcmremotewidgetshelper
User=root
|