page_title: Root directory
hierarchical_section_title: Root directory
caption_attribution_description: English: OpenIndiana snapshot from October 2015, showing "ls -l" output for the root filesystem. OpenIndiana is an open-source descendant of SVR4 and the Solaris operating system through the now-defunct OpenSolaris.
context_page_description: In a computer file system, and primarily used in the Unix and Unix-like operating systems, the root directory is the first or top-most directory in a hierarchy. 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.
context_section_description: In a computer file system, and primarily used in the Unix and Unix-like operating systems, the root directory is the first or top-most directory in a hierarchy.  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.
caption: View of the root directory in the OpenIndiana operating system
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