FHS 2.1 is done!

I'm pleased to announce the release of FHS 2.1, a updated version of the Filesystem Hierarchy Standard for Linux and other Unix-like operating systems. FHS is part of the draft Linux Standard Base specification, which will soon be updated to reflect FHS 2.1.

FHS 2.1 supersedes both FSSTND 1.2 and FHS 2.0. There have been some significant improvements and bug fixes since FHS 2.0. Please see the FHS web site for details. (It has been a few years since the last official release, so check it out if you're using a previous version of FHS or FSSTND.)

What is FHS?

FHS defines a common arrangement of the many files and directories in Unix-like systems (the filesystem hierarchy) that many different developers and groups have agreed to use. See below for details on retrieving the standard.

The FHS specification is used by the implementors of Linux distributions and other Unix-like operating systems, application developers, and open-source writers. In addition, many system administrators and users have found it to be a useful resource.

FHS or its predecessor, FSSTND, is currently implemented by most major Linux distributions, including Debian, Red Hat, Caldera, SuSE, and more.

FHS 2.1 and other FHS-related information is available at:

Information on the Linux Standard Base is available at:

Daniel Quinlan
FHS editor
Linux Standard Base chair