( Old client

Info Catalog ( Can not connect to server ( Common errors ( Password too long
 A.2.3 `Client does not support authentication protocol'
 MySQL 4.1 and up uses an authentication protocol based on a password
 hashing algorithm that is incompatible with that used by older clients.
 If you upgrade the server to 4.1, attempts to connect to it with an
 older client may fail with the following message:
      shell> mysql
      Client does not support authentication protocol requested
      by server; consider upgrading MySQL client
 To solve this problem, you should use one of the following approaches:
    * Upgrade all client programs to use a 4.1.1 or newer client library.
    * When connecting to the server with a pre-4.1 client program, use
      an account that still has a pre-4.1-style password.
    * Reset the password to pre-4.1 style for each user that needs to
      use a pre-4.1 client program. This can be 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')
               -> WHERE 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 you what the original
      password was, so you'll need to pick a new one.
    * Tell the server to use the older password hashing algorithm:
        1. Start `mysqld' with the `--old-passwords' option.
        2. Assign an old-format password to each account that has had
           its password updated to the longer 4.1 format. You can
           identify these accounts with 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.
 For additional background on password hashing and authentication, see
  Password hashing.
Info Catalog ( Can not connect to server ( Common errors ( Password too long
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