authentication plugin 'caching

Authentication plugin 'caching_sha2_password' cannot be loaded错误是在连接MySQL8时出现的问题。这个错误的原因是旧版本的图形界面工具不支持MySQL8使用的加密规则caching_sha2_password。解决这个问题的方法有两种。第一种是升级图形界面工具的版本，以适配MySQL8的加密规则。第二种方法是将MySQL8用户的密码加密规则还原为mysql_native_password。

第二种解决方案可以通过命令行登录MySQL数据库并执行以下命令来实现:
1. 使用mysql数据库: `USE mysql;`
2. 修改'root'@'localhost'用户的密码规则和密码: `ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'abc123';`
3. 刷新权限: `FLUSH PRIVILEGES;`

另外，你也可以通过执行以下命令解决这个问题:
1. 查看加密方式: `show variables like 'default_authentication_plugin';`
2. 查看本地mysql用户的信息: `select host,user,plugin from mysql.user;`
3. 修改root账户的加密方式为mysql_native_password: `ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';`

另外还有一种解决方法是执行以下步骤:
1. 进入Mysql: `mysql -uroot -p`
2. 修改账户密码加密规则并更新用户密码:
- 修改加密规则: `ALTER USER 'root'@'localhost' IDENTIFIED BY 'password' PASSWORD EXPIRE NEVER;`
- 更新用户密码: `ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';`
3. 刷新权限: `flush privileges;`
4. 重置密码: `alter user 'root'@'localhost' identified by 'your_new_password';`

这些方法可以解决authentication plugin 'caching_sha2_password' cannot be loaded错误。请根据你的具体情况选择其中的一种方法进行操作。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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