1 配置yum源安装    yum配置文件 /etc/yum.repos.d

yum install mariadb mariadb-server

2 修改root用户默认密码

update user set password=password("xxxx") where user="root";  修改root用户密码

flush privileges; 刷新权限，

3.开放远程端口权限，在mysql表内执行

创建用户命令

mysql>create user 'username'@'localhost' identified by 'password';

直接创建用户并授权的命令

mysql>grant all on *.* to  'username'@'localhost' indentified by 'password';

授予外网登陆权限 

mysql>grant all privileges on *.* to 'username'@'%' identified by 'password';

授予权限并且可以授权

mysql>grant all privileges on *.* to 'username'@'hostname' identified by 'password' with grant option;

刷新权限

flush privileges;

这样就已x就安装完成了！