sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa sudo apt-get update sudo apt-get install mosquitto sudo apt-get install mosquitto-dev sudo apt-get install mosquitto-clients sudo service mosquitto status #打开一个终端，执行以下命令订阅主题"mqtt" mosquitto_sub -h localhost -t “mqtt” -v
#打开另外一个终端，发布消息到主题 “mqtt” mosquitto_pub -h localhost -t “mqtt” -m “Hello MQTT”
