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→Unix / Linux File Management Concepts
[[Image:directory-structure-1.png|thumb|right|350px|In Unix / Linux (as opposed to MS Windows), there are no drive letters (such as '''C:''', or '''D:''').<br> All files and directories appear under a single ancestor directory called "the '''root''' directory". ]]
The Unix/Linux file system is '''hierarchical''', similar to other operating systems such as '''Windows''', '''Mac OSX''', etc.
Files are organized in directories. Directories may contain sub-directories.