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→Unix / Linux Directory Concepts
===Unix / Linux Directory 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><br> All files and directories appear under a single ancestor directory called "the '''root''' directory". <br><br>Directory Pathnames ]]
The Unix/Linux file system is '''hierarchical''', similar to other operating systems such as<br>'''Windows''', '''Mac OSX''', etc.
Files are organized in directories. Directories may contain sub-directories.
In the Linux (Unix) OS, the "'''root directory'''" / is the starting directory, and other "child directories", "grandchild directories", etc. are created
The hierarchical structure resembles an "upside- down tree". There is actually a command called tree that can display a "tree diagram"!
=== Directory Pathnames ===
