背景：在CentOS7下搭建Mosquitto Server，Mosquitto Clients用於測試釋出、訂閱

1、下載repo檔案至 /etc/yum.repos.d/下

wget http://download.opensuse.org/repositories/home:/oojah:/mqtt/CentOS_CentOS-7/home:oojah:mqtt.repo

2、安裝Mosquitto Server、Clients

yum install mosquitto

yum install mosquitto-clients

3、Mosquitto Server啟動、停止

/etc/init.d/mosquitto start
【mosquitto -c /etc/mosquitto/mosquitto.conf–輸出過程資訊】
/etc/init.d/mosquitto stop

4、釋出MQTT訊息

mosquitto_pub -h localhost -m “Test message” -t test/topic1 -d

5、訂閱MQTT訊息

mosquitto_sub -h localhost -t test/topic1 -d