centos7 mysql/mariadb安装

由于小伙伴，事先手动安装了mysql，导致了一部分问题

彻底删除mysql

yum remove mysql mysql-server mysql-libs;

find / -name mysql 将找到的相关东西delete掉；

rpm -qa|grep mysql(查询出来的东东yum remove掉)

yum remove mariadb

yum -y install mariadb-server

//启动
systemctl start mariadb.service
//开机启动
systemctl enable mariadb
//状态
systemctl status mariadb
//停止
systemctl stop mariadb

为 MariaDB 配置远程访问权限