CentOS 7 安装Mysql环境
Centos7下彻底删除Mysql， 重新安装Mysql
常用操作命令
启动mysql服务
systemctl start mysqld.service
停止mysql服务
systemctl stop mysqld.service
重启mysql服务
systemctl restart mysqld.service
查看mysql服务当前状态
systemctl status mysqld.service
设置mysql服务开机自启动！！！
systemctl enable mysqld.service
停止mysql服务开机自启动
systemctl disable mysqld.service
