在现实当中，文件服务器一般通过网络提供服务，现在需要实现一个本地文件服务器。为了保证文件服务器的安全性和可用性，需要具有用户认证、权限管理、文件存储、文件管理四个方面的功能。-In reality, the file server to provide services through the network in general, and now need to achieve a local file server. File server in order to ensure the safety and availability, the need for user authentication, rights management, document storage, document management functions in four areas.