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NAME

       filesystems  -  Linux  filesystem types: ext, ext2, ext3, ext4, hpfs, iso9660, JFS, minix,
       msdos, ncpfs nfs, ntfs, proc, Reiserfs, smb, sysv, umsdos, vfat, XFS, xiafs

DESCRIPTION

       When, as is customary, the proc filesystem is mounted on /proc, you can find in  the  file
       /proc/filesystems  which  filesystems your kernel currently supports; see proc(5) for more
       details.  There is also a legacy sysfs(2) system call (whose availability is controlled by
       the  CONFIG_SYSFS_SYSCALL kernel build configuration option since Linux 3.15) that enables
       enumeration of the currently available filesystem types regardless of  /proc  availability
       and/or sanity.

       If  you need a currently unsupported filesystem, insert the corresponding kernel module or
       recompile the kernel.

       In order to use a filesystem, you have to mount it; see mount(2) and mount(8).

       The following list provides a short description of the available or historically available
       filesystems  in  the  Linux  kernel.   See  the  kernel  documentation for a comprehensive
       description of all options and limitations.

       erofs  is the Enhanced Read-Only File System, stable since Linux 5.4.  See erofs(5).

       ext    is an elaborate  extension  of  the  minix  filesystem.   It  has  been  completely
              superseded  by  the  second  version of the extended filesystem (ext2) and has been
              removed from the kernel (in Linux 2.1.21).

       ext2   is a disk filesystem that was used by Linux for fixed disks as  well  as  removable
              media.  The second extended filesystem was designed as an extension of the extended
              filesystem (ext).  See ext2(5).

       ext3   is a journaling version of the ext2 filesystem.  It is  easy  to  switch  back  and
              forth between ext2 and ext3.  See ext3(5).

       ext4   is  a  set  of  upgrades  to ext3 including substantial performance and reliability
              enhancements, plus large increases in volume, file, and directory size limits.  See
              ext4(5).

       hpfs   is  the  High  Performance  Filesystem, used in OS/2.  This filesystem is read-only
              under Linux due to the lack of available documentation.

       iso9660
              is a CD-ROM filesystem type conforming to the ISO/IEC 9660 standard.

              High Sierra
                     Linux supports High Sierra, the precursor to the ISO/IEC 9660  standard  for
                     CD-ROM  filesystems.   It  is  automatically  recognized  within the iso9660
                     filesystem support under Linux.

              Rock Ridge
                     Linux also supports the System Use Sharing Protocol records specified by the
                     Rock  Ridge  Interchange  Protocol.   They  are used to further describe the
                     files in the iso9660 filesystem to a UNIX host, and provide information such
                     as   long  filenames,  UID/GID,  POSIX  permissions,  and  devices.   It  is
                     automatically recognized within the iso9660 filesystem support under Linux.

       JFS    is a journaling filesystem, developed  by  IBM,  that  was  integrated  into  Linux
              2.4.24.

       minix  is the filesystem used in the Minix operating system, the first to run under Linux.
              It has a number of shortcomings, including a  64 MB  partition  size  limit,  short
              filenames, and a single timestamp.  It remains useful for floppies and RAM disks.

       msdos  is  the  filesystem used by DOS, Windows, and some OS/2 computers.  msdos filenames
              can be no longer than 8 characters, followed by an optional period and 3  character
              extension.

       ncpfs  is a network filesystem that supports the NCP protocol, used by Novell NetWare.  It
              was removed from the kernel in Linux 4.17.

              To use ncpfs, you need special programs, which can be found  at  ⟨ftp://ftp.gwdg.de
              /pub/linux/misc/ncpfs⟩.

       nfs    is the network filesystem used to access disks located on remote computers.

       ntfs   is  the  filesystem  native to Microsoft Windows NT, supporting features like ACLs,
              journaling, encryption, and so on.

       proc   is a pseudo filesystem which is used as an  interface  to  kernel  data  structures
              rather  than  reading  and interpreting /dev/kmem.  In particular, its files do not
              take disk space.  See proc(5).

       Reiserfs
              is a journaling filesystem, designed by Hans Reiser, that was integrated into Linux
              2.4.1.

       smb    is  a  network  filesystem  that  supports  the SMB protocol, used by Windows.  See
              ⟨https://www.samba.org/samba/smbfs/⟩.

       sysv   is an implementation of the System V/Coherent filesystem for Linux.  It  implements
              all of Xenix FS, System V/386 FS, and Coherent FS.

       umsdos is  an  extended  DOS  filesystem  used  by  Linux.   It  adds  capability for long
              filenames, UID/GID, POSIX permissions, and special  files  (devices,  named  pipes,
              etc.) under the DOS filesystem, without sacrificing compatibility with DOS.

       tmpfs  is  a  filesystem whose contents reside in virtual memory.  Since the files on such
              filesystems typically reside in RAM, file access is extremely fast.  See tmpfs(5).

       vfat   is an extended FAT filesystem used by Microsoft Windows95  and  Windows  NT.   vfat
              adds the capability to use long filenames under the MSDOS filesystem.

       XFS    is  a  journaling  filesystem,  developed  by  SGI,  that was integrated into Linux
              2.4.20.

       xiafs  was designed and implemented to be a stable, safe filesystem by extending the Minix
              filesystem  code.   It  provides  the  basic  most requested features without undue
              complexity.  The xiafs filesystem is no longer actively  developed  or  maintained.
              It was removed from the kernel in Linux 2.1.21.

SEE ALSO

       fuse(4), btrfs(5), ext2(5), ext3(5), ext4(5), nfs(5), proc(5), sysfs(5), tmpfs(5), xfs(5),
       fsck(8), mkfs(8), mount(8)