[CentOS] hostname service?

Sun Dec 27 23:03:07 UTC 2015
Nicholas Geovanis <nickgeovanis at gmail.com>

On CentOS 7, I find in /var/log/messages several times daily messages
"localhost systemd: Started Hostname Service.". However I can't seem to
find such a service using the systemctl command. What is the "Hostname
Service", what does it do and why is it being restarted frequently? Many