[Unit]
Description=Mosquitto MQTT v3.1/v3.1.1 Broker
Documentation=man:mosquitto.conf(5) man:mosquitto(8)

[Service]
Type=simple
User=mosquitto
Group=mosquitto
ExecStart=/usr/sbin/mosquitto -c /etc/mosquitto/mosquitto.conf

[Install]
WantedBy=multi-user.target