LSB Workgroup, The Linux Foundation

1 Filesystem Hierarchy StandardLSB Workgroup, The Linux FoundationFilesystem Hierarchy StandardLSB Workgroup, The Linux FoundationVersion date March 19, 2015 Copyright 2015 The Linux FoundationCopyright 1994-2004 Daniel QuinlanCopyright 2001-2004 Paul 'Rusty' RussellCopyright 2003-2004 Christopher YeohAbstractThis standard consists of a set of requirements and guidelines for file and directory placement under UNIX-likeoperating systems. The guidelines are intended to support interoperability of applications, system administration tools,development tools, and scripts as well as greater uniformity of documentation for these trademarks and copyrights are owned by their owners, unless specifically noted otherwise.

2 Use of a term in this document should not be regardedas affecting the validity of any trademark or service is granted to make and distribute verbatim copies of this standard provided the copyright and this permission notice are preserved onall is granted to copy and distribute modified versions of this standard under the conditions for verbatim copying, provided also that the titlepage is labeled as modified including a reference to the original standard, provided that information on retrieving the original standard is included,and provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this is granted to copy and distribute translations of this standard into another language, under the above conditions for modified versions,except that this permission notice may be stated in a translation approved by the copyright release is dedicated to the memory of Christopher Yeoh, a long-time friend and colleague.

3 And oneof the original editors of the FHS. Without his dedication this work would not have been of Contents1. introduction .. Purpose .. Conventions .. 12. The Filesystem .. 23. The Root Filesystem .. Purpose .. Requirements .. Specific Options .. /bin : Essential user command binaries (for use by all users) .. Purpose .. Requirements .. Specific Options .. /boot : Static files of the boot loader .. Purpose .. Specific Options.

4 /dev : Device files .. Purpose .. Specific Options .. /etc : Host-specific system configuration .. Purpose .. Requirements .. Specific Options .. /etc/opt : Configuration files for /opt .. /etc/X11 : Configuration for the X Window System (optional) .. /etc/sgml : Configuration files for SGML (optional) .. /etc/xml : Configuration files for XML (optional) .. /home : User home directories (optional) .. Purpose .. Requirements .. Home Directory Specifications and Conventions.

5 /lib : Essential shared libraries and kernel modules .. Purpose .. Requirements .. Specific Options .. /lib<qual> : Alternate format essential shared libraries (optional) .. Purpose .. Requirements .. /media : Mount point for removable media .. Purpose .. Specific Options .. /mnt : Mount point for a temporarily mounted filesystem .. Purpose .. /opt : Add-on application software packages .. Purpose .. Requirements .. /root : Home directory for the root user (optional).

6 Purpose .. /run : Run-time variable data .. Purpose .. Requirements .. /sbin : System binaries .. 15 Filesystem Hierarchy Purpose .. Requirements .. Specific Options .. /srv : Data for services provided by this system .. Purpose .. /tmp : Temporary files .. Purpose .. 174. The /usr Hierarchy .. Purpose .. Requirements .. Specific Options .. /usr/bin : Most user commands .. Purpose.

7 Requirements .. Specific Options .. /usr/include : Directory for standard include files.. Purpose .. Specific Options .. /usr/lib : Libraries for programming and packages .. Purpose .. Specific Options .. /usr/libexec : Binaries run by other programs (optional) .. Purpose .. /usr/lib<qual> : Alternate format libraries (optional) .. Purpose .. /usr/local : Local hierarchy .. Purpose .. Requirements .. Specific Options.

8 /usr/local/share : Local architecture-independent hierarchy .. /usr/sbin : Non-essential standard system binaries .. Purpose .. Requirements .. /usr/share : Architecture-independent data .. Purpose .. Requirements .. Specific Options .. /usr/share/color : Color management information (optional) .. /usr/share/dict : Word lists (optional) .. /usr/share/man : Manual pages .. /usr/share/misc : Miscellaneous architecture-independent data .. /usr/share/ppd : Printer definitions (optional).

9 /usr/share/sgml : SGML data (optional) .. /usr/share/xml : XML data (optional) .. /usr/src : Source code (optional) .. Purpose .. 295. The /var Hierarchy .. Purpose .. Requirements .. Specific Options .. /var/account : Process accounting logs (optional) .. Purpose .. /var/cache : Application cache data .. Purpose .. 31 Filesystem Hierarchy Specific Options .. /var/cache/fonts : Locally-generated fonts (optional) .. /var/cache/man : Locally-formatted manual pages (optional).

10 /var/crash : System crash dumps (optional) .. Purpose .. /var/games : Variable game data (optional) .. Purpose .. /var/lib : Variable state information .. Purpose .. Requirements .. Specific Options .. /var/lib/<editor> : Editor backup files and state (optional) .. /var/lib/color : Color management information (optional) .. /var/lib/hwclock : State directory for hwclock (optional) .. /var/lib/misc : Miscellaneous variable data .. /var/lock : Lock files.