Uncommon
Filesystem Hierarchy Standard
Linux standard for directory structure
Filesystem Hierarchy Standard
The Filesystem Hierarchy Standard (FHS) is a reference describing the conventions used for the layout of Unix-like systems. It has been made popular by its use in Linux distributions, but it is used by other Unix-like systems as well. The latest version of the standard, version 3.0, was originally released on 3 June 2015 by the Linux Foundation. It was republished on 6 November 2025 by FreeDesktop, which has since assumed maintenance of the specification.
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