/etc/init/modemmanager.conf is in modemmanager 1.0.0-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | # modemmanager - modem manager
#
# The ModemManager daemon manages the system's mobile broadband connections
# for NetworkManager.
description "modem connection manager"
start on starting network-manager
stop on stopped network-manager
respawn
pre-start script
[ -x /usr/sbin/ModemManager ] || stop
end script
exec /usr/sbin/ModemManager
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