Restart the Service

sudo systemctl restart mosquitto

Publishing from the Command Line

mosquitto_pub -u xxxxx -P xxxxx -t 'test/topic' -m 'helloWorld'

Subscribing to all topics

mosquitto_sub -u xxxxx -P xxxxxx -t +/#

Start the service

sudo systemctl start mosquitto

Stop the service

sudo systemctl stop mosquitto

Configuration

persistence true persistence_location /var/lib/mosquitto/

log_dest file /var/log/mosquitto/mosquitto.log

include_dir /etc/mosquitto/conf.d password_file /etc/mosquitto/passwd listener 1883 192.168.1.19 allow_anonymous false

Tools

MQTT.fx, java based client for Windows