8.MySQL控制命令：启动、停止、重启、查看状态
/bin/systemctl start mysqld.service
/bin/systemctl status mysqld.service
/bin/systemctl stop mysqld.service
/bin/systemctl restart mysqld.service
本文整理自：
http://www.cnblogs.com/jorzy/p/8455519.html
https://www.linuxidc.com/Linux/2016-06/132676.htm
centos 7 安装mysql5.7
标签：gre host password 图片 一个 code 注意 install yum 源