Installation and configuration of Centos7-mqtt message middleware mosquitto

All blogs referenced

https://www.cnblogs.com/star91/p/5002297.html

https://lanseyujie.com/post/mosquitto-installation-and-usage.html

http://blog.csdn.net/ MENGHUANBEIKE/article/details/75247555

http://blog.csdn.net/qhdcsj/article/details/45042515

http://blog.csdn.net/MENGHUANBEIKE/article/details/75247555