Filesystem Objects

Nearly every operating system in history structures its collection of stored objects in a hierarchy, which is a tree of objects containing other objects. This hierarchy allows a sane organization of objects and allows identically named objects to appear in multiple locations, an essential feature for multiuser systems such as Linux. Information about each object in the filesystem is stored in a table (which itself is part of the filesystem), and each object is numbered uniquely within that table. Although there are a few special object types on Linux systems, the two most common are directories and files.

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