研究Linux文件系统CRAMFS内部结构的代码。对于搞懂这个文件系统，具有很大的参考价值 用法：选择压缩包的a.mtd,点击start. -Linux file system CRAMFS study the internal structure of the code. To get to know the file system, has great reference value to use: Select the compressed package a.mtd, click