1、添加 EPEL 软件库
yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
2、查找 mosquitto 软件包：yum list all | grep mosquitto
3、安装 mosquitto 软件包： yum install mosquitto
4、查看安装结果：yum list installed | grep mosquitto
二、测试服务1、 启动 mosquitto服务
2、启动客户端订阅：mosquitto_sub -t mytopic
3、向mytopic发送数据，则订阅者收到消息，服务（broker）与发布者建立链接
三、配置开机启动
1、systemctl list-unit-files：查看软件开机自启情况
systemctl enable mosquitto 使mosquitto开机自启
2、开启、关闭、状态查看命令：systemctl start/stop/status mosquitto
