This section describes how to install the test authentication plugin. For general information about installing plugins, see Section 5.6.1, “Installing and Uninstalling Plugins”.本节介绍如何安装测试身份验证插件。有关安装插件的一般信息，请参阅第5.6.1节，“安装和卸载插件”。

To be usable by the server, the plugin library file must be located in the MySQL plugin directory (the directory named by the plugin_dir system variable). 为了让服务器使用，插件库文件必须位于MySQL插件目录（由plugin_dir系统变量命名的目录）中。If necessary, configure the plugin directory location by setting the value of plugin_dir at server startup.如有必要，在服务器启动时通过设置plugin_dir的值来配置插件目录位置。

To load the plugin at server startup, use the --plugin-load-add option to name the library file that contains it. With this plugin-loading method, the option must be given each time the server starts. 要在服务器启动时加载插件，请使用--plugin-load-add选项命名包含它的库文件。使用此插件加载方法，每次服务器启动时都必须给出该选项。For example, put these lines in the server my.cnf file, adjusting the .so suffix for your platform as necessary:例如，将这些行放入服务器my.cnf文件中，根据需要调整您的平台的.so后缀：

[mysqld]
plugin-load-add=auth_test_plugin.so

After modifying my.cnf, restart the server to cause the new settings to take effect.修改my.cnf后，重新启动服务器以使新设置生效。

Alternatively, to load the plugin at runtime, use this statement, adjusting the .so suffix for your platform as necessary:或者，要在运行时加载插件，请使用以下语句，根据需要调整您的平台的.so后缀：

INSTALL PLUGIN test_plugin_server SONAME 'auth_test_plugin.so';

INSTALL PLUGIN loads the plugin immediately, and also registers it in the mysql.plugins system table to cause the server to load it for each subsequent normal startup without the need for --plugin-load-add.INSTALL PLUGIN会立即加载插件，并将其注册到mysql.plugins系统表中，以便服务器在每次后续正常启动时加载它，而不需要--plugin-load-add。

To verify plugin installation, examine the INFORMATION_SCHEMA.PLUGINS table or use the SHOW PLUGINS statement (see Section 5.6.2, “Obtaining Server Plugin Information”). For example:要验证插件安装，请检查INFORMATION_SCHEMA.PLUGINS表或使用SHOW PLUGINS语句（请参阅第5.6.2节，“获取服务器插件信息”）。例如：

mysql> SELECT PLUGIN_NAME, PLUGIN_STATUS
FROM INFORMATION_SCHEMA.PLUGINS
WHERE PLUGIN_NAME LIKE '%test_plugin%';
+--------------------+---------------+
| PLUGIN_NAME        | PLUGIN_STATUS |
+--------------------+---------------+
| test_plugin_server | ACTIVE        |
+--------------------+---------------+

If the plugin fails to initialize, check the server error log for diagnostic messages.如果插件初始化失败，请检查服务器错误日志中的诊断消息。

To associate MySQL accounts with the test plugin, see Using Test Pluggable Authentication.要将MySQL帐户与测试插件相关联，请参阅使用测试可插拔身份验证。

The method used to uninstall the test authentication plugin depends on how you installed it:卸载测试身份验证插件的方法取决于您的安装方式：

To use the test authentication plugin, create an account and name that plugin in the IDENTIFIED WITH clause:要使用测试身份验证插件，请创建一个帐户，并在IDENTIFIED WITH子句中为该插件命名：

CREATE USER 'testuser'@'localhost'
IDENTIFIED WITH test_plugin_server
BY 'testpassword';

Then provide the --user and --password options for that account when you connect to the server. For example:然后在连接到服务器时为该帐户提供--user和--password选项。例如：

shell> mysql --user=testuser --password
Enter password: testpassword

The plugin fetches the password as received from the client and compares it with the value stored in the authentication_string column of the account row in the mysql.user system table. 插件从客户端获取密码，并将其与mysql.user系统表中帐户行的authentication_string列中存储的值进行比较。If the two values match, the plugin returns the authentication_string value as the new effective user ID.如果这两个值匹配，插件将返回authentication_string值作为新的有效用户ID。

You can look in the server error log for a message indicating whether authentication succeeded (notice that the password is reported as the “user”):您可以在服务器错误日志中查找指示身份验证是否成功的消息（请注意，密码被报告为“用户”）：

[Note] Plugin test_plugin_server reported:
'successfully authenticated user testpassword'