理解Linux的文件系统的组织；掌握常用的数据结构；系统采用两级目录，其中第一级对应于用户账号，第二级对应于用户帐号下的文件 使用文件来模拟外存，进行数据结构设计和操作算法的设计，实现一个文件系统并实现基本的文件操作（为了简便文件系统，不考虑文件共享，文件系统安全以及管道文件与设备文件等特殊内容）。

-Understanding of Linux file system organization　have commonly used data structure　system uses two directories, which correspond to first-level user account, and the second level corresponds to the user account under documents　the use of paper to simulate the Core, the data structure the design and operation of algorithm design, the realization of a file system and the realization of the basic file operations (for simple file system, do not consider file-sharing, file system security, as well as documents and equipment, pipeline and other special content document).