https://www.cnblogs.com/zhanzhan/p/7729981.html
yum -y install mariadb mariadb-server
systemctl start mariadb
mysql_secure_installation
mysql -uroot -ppassword
systemctl stop firewalld.service #停止firewall
systemctl disable firewalld.service #禁止firewall开机启动
原文：https://www.cnblogs.com/jinwenb/p/9205180.html