Introduction - If you have any usage issues, please Google them yourself
Simulation of unix operating system file system functions, in a terminal interface as unix users, like the shell command to import some orders, such as the input file directory ls show, chmod to change file permissions, chown change file owner, chgrp to change the file belongs to group chnam change the file name, pwd show current directory, cd to change the current directory, mkdir to create directories, rmdir delete directory, mk create a file, cp file copy, rm to delete files, cat shows the contents of the documents, login to switch user, passwd modify user passwords and other functions . In the background, it is necessary to realize a mixed-type index file structure, including its stack node idle idle node management and group management links fat free disk blocks.