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使用PHPMYADMIN时报错：
Client does not support authentication protocol requested
by server; consider upgrading MySQL client

官方的说法是

MySQL 4.1 and up uses an authentication protocol based on a password hashing algorithm that is incompatible with that used by older clients. .....




如果你升级mysql到4.1以上版本后遇到以上问题,请先确定你的mysql client 是4.1或者更高版本.(WINDOWS下有问题你就直接跳到下面看解决方法了,因为MYSQL 在WINDOWS是client和server一起装上了的)

请使用以下两种方法之一

其一:

mysql> SET PASSword FOR
-> 'some_user'@'some_host' = OLD_PASSword('newpwd');

其二:

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