Filesystem Hierarchy Standard

Filesystem Hierarchy Standard
AbbreviationFHS
StatusPublished
Year started14 February 1994 (1994-02-14)
Latest version3.0
3 June 2015 (2015-06-03)
OrganizationFreeDesktop.org
Previously: Linux Foundation
DomainDirectory structure
WebsiteOfficial website

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.