Editing List of file systems (section)

== Special-purpose file systems ==
* [[aufs]] an enhanced version of [[UnionFS]] stackable unification file system
* [[AXFS]] (small footprint compressed read-only, with [[XIP]])
* [[Barracuda Networks|Barracuda]] WebDAV plug-in. Secure Network File Server for embedded devices.
* [[Boot File System]] is used on UnixWare to store files necessary for its boot process.
* CDfs - a Linux [[virtual file system]] that provides access to individual data and audio tracks on [[compact disc]]s<ref>{{cite web |url=https://users.elis.ugent.be/~mronsse/cdfs/ |title=CDfs}}</ref><ref>{{cite web |url=https://wiki.christophchamp.com/index.php?title=CDfs |title=CDfs |website=Christoph Champ's Wiki}}</ref>
* [[Compact Disc File System]] (reading and writing of CDs; experimental)
* [[CFS (Compact File Set file format)|cfs]] (caching)
* [[Cramfs]] (small footprint compressed read-only)
* [[Davfs2]] ([[WebDAV]])
* [[Freenet]] – Decentralized, censorship-resistant
* [[FTPFS]] (FTP access)
* GmailFS (Google Mail File System)
* GridFS – GridFS is a specification for storing and retrieving files that exceed the BSON-document size limit of 16 MB for [[MongoDB]].
* [[lnfs]] (long names)
* [[LTFS]] (Linear Tape File System for LTO and Enterprise tape)
* [[MultiVersion File System|MVFS]] – MultiVersion File System, proprietary, used by [[IBM DevOps Code ClearCase]].
* [https://nexustorage.com Nexfs] Combines Block, File, Object and Cloud storage into a single pool of auto-tiering POSIX compatible storage.
* [[OverlayFS]] – A [[union mount]] [[filesystem]] implementation for [[Linux]]. Used mainly by [[Docker (software)|Docker]] for its image layers.
* [[romfs]]
* [[SquashFS]] (compressed read-only)
* [[UMSDOS]], [[UVFAT]] – FAT file systems extended to store permissions and metadata (and in the case of UVFAT, [[VFAT]] long file names), used for Linux
* [[UnionFS]] – stackable unification file system, which can appear to merge the contents of several directories (branches), while keeping their physical content separate
* [[Vault File System|VaultFS]] – can intermixably utilize SMR [[shingled magnetic recording]] disks to achieve the highest storage densities
* [[Venti (software)|Venti]] – Plan 9 de-duplicated storage used by [[Fossil (file system)|Fossil]].

=== Pseudo file systems ===
* [[devfs]] – a virtual file system in Unix-like operating systems for managing device nodes on-the-fly
* [[procfs]] – a pseudo-file system, used to access kernel information about processes
* [[tmpfs]] – in-memory temporary file system (on Unix-like platforms)
* [[sysfs]] – a virtual file system in [[Linux kernel|Linux]] holding information about buses, devices, firmware, filesystems, etc.
* [[debugfs]] – a virtual file system in [[Linux kernel|Linux]] for accessing and controlling kernel debugging
* [[configfs]] – a writable file system used to configure various kernel components of [[Linux kernel|Linux]]
* [[sysctlfs]] – allow accessing [[sysctl]] nodes via a file system; available on [[NetBSD]] via PUFFS,<ref>{{cite web |title=mount_sysctlfs(8) |url=https://man.netbsd.org/NetBSD-8.2/mount_sysctlfs.8 |website=NetBSD Manual Pages |access-date=2021-07-10 |date=2010-04-11}}</ref> [[FreeBSD]] kernel via a 3rd-party module,<ref>{{cite web |author1=Pawel Jakub Dawidek |url=http://garage.freebsd.pl/sysctlfs.README |access-date=2021-07-10 |archive-url=https://web.archive.org/web/20050223085646/http://garage.freebsd.pl/sysctlfs.README |archive-date=2005-02-23 |format=text/plain |date=2002-12-24 |url-status=dead |title=sysctlfs.README}}</ref><ref>{{cite web |author1=Pawel Jakub Dawidek |title=Re: Hmm, sysctlfs. |url=https://marc.info/?l=freebsd-hackers&m=104071603827080 |access-date=2021-07-10 |date=2002-12-24}}</ref><ref>{{cite web |title=Hacking FreeBSD / sysctlfs / [9a7ced] |url=https://sourceforge.net/p/hacking-freebsd/sysctlfs-code/ci/master/tree/ |website=SourceForge |access-date=2021-07-10}}</ref> and [[Linux kernel|Linux]] as a part of Linux procfs.<ref>{{cite web |author1=Terrehon Bowden |author2=Bodo Bauer |author3=Shen Feng |title=Chapter 2: Modifying System Parameters - The /proc Filesystem |url=https://www.kernel.org/doc/html/latest/filesystems/proc.html#chapter-2-modifying-system-parameters |website=The Linux Kernel |access-date=2021-07-10}}</ref>
* [[kernfs (BSD)|kernfs]] – a file system found on some BSD systems (notably [[NetBSD]]) that provides access to some kernel state variables; similar to sysctlfs, Linux procfs and Linux sysfs.
* [[WinFS]] - Uses a relational database to manage files
* [[wikifs]] – a server application for [[Plan 9 from Bell Labs|Plan 9]]'s virtual, [[wiki]], file system

=== Compressed file systems ===

* [[VaultFS]] – auto background compression (writing) & decompression (reading) per file or directory:  ten levels: 0 (uncompressed) ... 9 (maximal compression)

=== Encrypted file systems ===

{{See also|Rubberhose (file system)}}

* [[eCryptfs]] – a stacked cryptographic file system in the Linux kernel since 2.6.19
* [[EncFS]], GPL [[Disk encryption software|Encrypted file system]] in user-space
* [[Encrypting File System|EFS]] – an encrypted file system for [[Microsoft Windows]] systems and [[AIX operating system|AIX]]. An extension of [[NTFS]]
* [[Vault File System|VaultFS]] – optional & multiple encryption(s) per-file or directory tree, at rest and in motion
* [[ZFS]], with encryption support.

=== File system interfaces ===
These are not really file systems; they allow access to file systems from an operating system standpoint.

* [[FUSE (linux)|FUSE]] (file system in userspace, like LUFS but better maintained)
* LUFS (Linux userland file system – seems to be abandoned in favour of [[FUSE (linux)|FUSE]])
* [[Pass-to-Userspace Framework File Fystem|PUFFS]] (Userspace filesystem for NetBSD, including a compatibility layer called '''librefuse''' for porting existing FUSE-based applications)
* [[SSHFS|Secure Shell File System]] (SSHFS) – locally mount a remote directory on a server using only a [[secure shell]] login.
* [[Virtual file system|VFS]] Virtual Filesystem