本章目的是分析在Linux系统中如何实现新的文件系统。在介绍文件系统具体实现前先介绍文件系统的概念和作用，抽象出了文件系统概念模型。熟悉文件系统的内涵后，我们再近一步讨论Linux系统中和文件系统的特殊风格和具体文件系统在Linux中组成结构，逐步为读者勾画出Linux中文件系统工作的全景图。最后在事例部分，我们将以romfs文件系统作实例分析实现文件系统的普遍步骤。-The purpose of this chapter is to analyze how the Linux system, a new file system. In introducing the concrete realization of the file system the file system prior to introducing the concept and the role of abstract conceptual model of the file system. Familiar with the content of the file system, we discuss the Linux system and then taking a step forward and file system' s special style and the specific file system in Linux, composition, and gradually the reader lays out a Linux file system to work in the panorama. Finally, in some cases, we will romfs file system, file systems for instance analysis of the universal realization of the steps.