Mariadb使用root账户登陆数据库创建用户，并赋予用户特定数据库权限和远程登陆权限
一、使用root账号登陆mariadb数据库
[root@bigdata1 ~]# mysql -uroot -pAaaaBbbb123Welcome to the MariaDB monitor. Commands end with ; or \g.Your MariaDB connection id is 81624Server version: 5.5.68-MariaDB MariaDB ServerCopyright (c) 2000, , Oracle, MariaDB Corporation Ab and others.Type help; or \h for help. Type \c to clear the current input statement.</
