MYSQLに「Client does not support authentication」の解決策が現れた
2755 ワード
MYSQLヘルプ:
A.2.3
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:
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 Tell the server to use the older password hashing algorithm: Start 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:
For additional background on password hashing and authentication, see section 5.5.9 Password Hashing in MySQL 4.1.
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:
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. mysqld
with the --old-passwords
option. 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 section 5.5.9 Password Hashing in MySQL 4.1.