Principles Unix filesystem

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the original unix file system supported 3 types of files: ordinary files, directories, , special files , termed device files. berkeley software distribution (bsd) , system v each added file type used interprocess communication: bsd added sockets, while system v added fifo files.


bsd added symbolic links (often termed symlinks ) range of file types, files refer other files, , complement hard links. symlinks modeled after similar feature in multics, , differ hard links in may span filesystems , existence independent of target object. other unix systems may support added types of files.








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