场景
安装后首次运行mysql命令报错误：
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement
修改密码
mysql> alter user user() identified by ‘admin@123456’;
Query OK, 0 rows affected (0.03 sec)
mysql>flush privileges ；
Query OK, 0 rows affected (0.01 sec)
授权远程访问
mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'admin@123456' WITH GRANT OPTION;
mysql>flush privileges ；
Query OK, 0 rows affected (0.01 sec)
