Centos7安装mariadb
yum install -y mariadb-server
systemctl enable mariadb
systemctl start mariadb
systemctl status mariadb
mysql_secure_installation
firewall-cmd --add-port=3306/tcp --permanent
firewall-cmd --reload
mysql -u root -p
MariaDB [(none)]> GRANT ALL ON . TO root@'%' IDENTIFIED BY "yourpassword";
MariaDB [(none)]> FLUSH PRIVILEGES;
MariaDB [(none)]> exit