mysql启动的几种姿势

                              ##mysql启动的几种姿势

        /*
        * 使用systemctl命令启动和关闭mysql
        *
        * 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
        *