Client does not support authentication protocol requested by server; consider upgrading MySQL client

错误编号：1251

问题分析：

Client 不能支持 authentication protocol 的要求

解决办法：

方法1：mysql> SET PASSWORD FOR
-> ' some_user '@' some_host ' = OLD_PASSWORD(' newpwd ');

结合我们的实际情况,在 MySQL Command Line Client 下运行:

set password for root@localhost = old_password('123456');

方法2:

mysql> UPDATE mysql.user SET Password = OLD_PASSWORD('newpwd')
    -> WHERE Host = 'some_host' AND User = 'some_user';
mysql> FLUSH PRIVILEGES;

上面红色的部分请按自己实际情况修改。