Warning: mysql_connect() [function.mysql-connect]: Premature end of data (mysqlnd_wireprotocol.c:554) in path/to/the/file/where/connection/script/is/written/
Warning: mysql_connect() [function.mysql-connect]: OK packet 1 bytes shorter than expected in path/to/the/file/where/connection/script/is/written/
Warning: mysql_connect() [function.mysql-connect]: mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication. Please use an administration tool to reset your password with the command SET PASSWORD = PASSWORD('your_existing_password'). This will store a new, and more secure, hash value in mysql.user. If this user is used in other scripts executed by PHP 5.2 or earlier you might need to remove the old-passwords flag from your my.cnf file in path/to/the/file/where/connection/script/is/written/
old_passwords = 1
mysql> SELECT Length(PASSWORD('xyz'));
+-------------------------+
| Length(PASSWORD('xyz')) |
+-------------------------+
| 16 |
+-------------------------+
1 row in set (0.00 sec)
mysql> SELECT user, Length(`Password`) FROM `mysql`.`user`;
This will show you which passwords are in the old format, ex:
+----------+--------------------+
| user | Length(`Password`) |
+----------+--------------------+
| root | 41 |
| root | 16 |
| user2 | 16 |
| user2 | 16 |
+----------+--------------------+
UPDATE mysql.user SET Password = PASSWORD('password') WHERE user = 'username';
FLUSH PRIVILEGES;
原文地址:http://lampsailesh.blogspot.com/2011/05/mysql-41-using-old-authentication.html