MYSQL displays "Clientdoesnotsupportauthentication"

Solution to clientdoesnotsuppauthauthentication in MYSQL

How to solve the problem of Client does not support authentication in MYSQL

MYSQL help: 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> mysqlClient does not support authentication protocol requestedby 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 usingSET PASSWORDStatement andOLD_PASSWORD()Function:

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

  Alternatively, useUPDATEAndFLUSH 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''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. StartmysqldWith--old-passwordsOption.
  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, useHostAndUserValues and assign a password usingOLD_PASSWORD()Function and eitherSET PASSWORDOrUPDATE, As described earlier.

For additional background on password hashing and authentication, see section.