第一次安装完mysql，修改默认密码的时候，报“The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement”。

先刷新mysql然后再重新修改密码即可。

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.01 sec)