After MYSQL 4.1, adopted a new user authentication protocol, for the old client will appear does not support the authentication protocol error, the following is the official website solution;
1Upgrade all client programs to use a 4.1.1 or newer client library.
Update the client library, which needs to update the PHP extension library, for the old API PHP has not provided such an extension library
2When connecting to the server with a pre-4.1 client program, the use of the account that still have a pre-4.1-style password.
Using a previously established account connection will not be available for accounts established under the new authentication agreement.
3Reset the password to pre-4.1 style for each user, needs to use a pre-4.1 client program. This can is done using the SET PASSWORD statement and the Old_password () function:mysql> SET PASSWORD for
' Some_user ' @ ' some_host ' = Old_password (' newpwd ');
Alternatively, use Update and FLUSH privileges:mysql> update mysql.user SET Password = Old_password (' newpwd '), WH ERE Host = ' some_host ' and User = ' some_user ';
mysql> FLUSH privileges;
Substitute the password you want to use for "newpwd" in the preceding examples. MySQL cannot tell the original password is, so you'll need to pick a new one.
This is a good way to create a new account with an old-fashioned encryption protocol
4Tell the server to use the older password hashing algorithm:
Start mysqld with the--old-passwords option.
The advantages of this new authentication protocol are not available.
5Assign an Old-format password to all account for that have had its password updated to the longer 4.1 format. You can identify these accounts and the following query:mysql> SELECT Host, User, Password from Mysql.user
WHERE LENGTH (Password) > 16;
For each account record displayed by the query, use the Host and User values and assign a password using the Old_password ( function and either SET PASSWORD or UPDATE, as described earlier.
Restore has upgraded the password to the old style
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