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In a computer [[file system]], and primarily used in the [[Unix]] and [[Unix-like]] [[Operating system|operating systems]], the '''root directory''' is the first or top-most [[Directory (computing)|directory]] in a hierarchy.

== Description ==

It can be likened to the trunk of a tree, as the starting point where all branches originate from.

The root file system is the file system contained on the same disk partition on which the root directory is located; it is the filesystem on top of which all other file systems are mounted as the system boots up.

== See also ==

* [[Directory (computing)]]
* [[File system]]
* [[Filesystem Hierarchy Standard]] (FHS)
* [[Home directory]]
* [[Parent directory]]
* [[Working directory]]

== External links ==

* [https://en.wikipedia.org/wiki/Root_directory Root directory] @ Wikipedia

[[Category:Computer science]]
[[Category:Computing]]