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Brief about the directory representation in UNIX OS?


A Unix directory is a file containing a correspondence between filenames and inodes. A directory is a special file that the kernel maintains. Only kernel modifies directories, but processes can read directories. The contents of a directory are a list of filename and inode number pairs. When new directories are created, kernel makes two entries named . (refers to the directory itself) and .. (refers to parent directory).
System call for creating directory is mkdir (pathname, mode).

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