sudo apt install mosquitto mosquitto-clients mosquitto-dev

/etc/init.d/mosquitto stop
update-rc.d mosquitto disable
systemctl disable mosquitto
systemctl mask mosquitto

echo "\nlistener 1883\nallow_anonymous true" >> /etc/mosquitto/mosquitto.conf

/usr/sbin/mosquitto -c /etc/mosquitto/mosquitto.conf

MQTT host is listening at 192.168.0.13

mosquitto_sub -h 192.168.0.13 -t '#'