如果您跟随最佳实践，例如对自己的应用程序分层，就可以用最轻松的方式进行修改。
If you follow best practices, such as layering your application, changes can be applied with minimal effort.
这个分层的结构是完全可配置的，并且可以动态地修改。
The structure of the hierarchy is completely configurable and can be changed on the fly.
假设正在使用OpenSSH，将需要修改名为sshd_config的文件来允许分层。
Assuming you are using OpenSSH, you will need to modify a file called sshd_config to allow this.
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