.\" Copyright 1996 Daniel Quinlan (Daniel.Quinlan@linux.org)
.\"
+.\" %%%LICENSE_START(GPLv2+_DOC_FULL)
.\" This is free documentation; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; either version 2 of
.\" GNU General Public License for more details.
.\"
.\" You should have received a copy of the GNU General Public
-.\" License along with this manual; if not, write to the Free
-.\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
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.\" 2007-12-14 mtk Added Reiserfs, XFS, JFS.
.\"
-.TH FILESYSTEMS 5 2007-12-14 "Linux" "Linux Programmer's Manual"
+.TH FILESYSTEMS 5 2015-03-29 "Linux" "Linux Programmer's Manual"
.nh
.SH NAME
-filesystems \- Linux filesystem types: minix, ext, ext2, ext3, Reiserfs,
-XFS, JFS, xia, msdos,
-umsdos, vfat, proc, nfs, iso9660, hpfs, sysv, smb, ncpfs
+filesystems \- Linux filesystem types: ext, ext2, ext3, ext4, hpfs, iso9660,
+JFS, minix, msdos, ncpfs nfs, ntfs, proc, Reiserfs, smb, sysv, umsdos, vfat,
+XFS, xiafs,
.SH DESCRIPTION
When, as is customary, the
.B proc
.IR /proc ,
you can find in the file
.I /proc/filesystems
-which filesystems your kernel currently supports.
-If you need a currently unsupported one, insert the corresponding
+which filesystems your kernel currently supports;
+see
+.BR proc (5)
+for more details.
+If you need a currently unsupported filesystem, insert the corresponding
module or recompile the kernel.
In order to use a filesystem, you have to
it; see
.BR mount (8).
-Below a short description of a few of the available filesystems.
+Below a short description of the available or historically available
+filesystems in the Linux kernel.
+See kernel documentation for a comprehensive
+description of all options and limitations.
.TP 10
-.B "minix"
-is the filesystem used in the Minix operating system, the first to run
-under Linux.
-It has a number of shortcomings: a 64MB partition size
-limit, short filenames, a single time stamp, etc.
-It remains useful for floppies and RAM disks.
-.TP
.B ext
is an elaborate extension of the
.B minix
is the high performance disk filesystem used by Linux for fixed disks
as well as removable media.
The second extended filesystem was designed as an extension of the
-extended file system
+extended filesystem
.RB ( ext ).
-.B ext2
-offers the best performance (in terms of speed and CPU usage) of
-the filesystems supported under Linux.
+.RB See " ext2 " (5).
.TP
.B ext3
-is a journaling version of the ext2 filesystem.
+is a journaling version of the
+.B ext2
+filesystem.
It is easy to
-switch back and forth between ext2 and ext3.
-.TP
-.B Reiserfs
-is a journaling file system, designed by Hans Reiser,
-that was integrated into Linux in kernel 2.4.1.
-.TP
-.B XFS
-is a journaling file system, developed by SGI,
-that was integrated into Linux in kernel 2.4.20.
-.TP
-.B JFS
-is a journaling file system, developed by IBM,
-that was integrated into Linux in kernel 2.4.24.
-.TP
-.B 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
-.B xia
-filesystem is no longer actively developed or maintained.
-It was removed from the kernel in 2.1.21.
-.TP
-.B msdos
-is the filesystem used by DOS, Windows, and some OS/2 computers.
-.B msdos
-filenames can be no longer than 8 characters, followed by an
-optional period and 3 character extension.
-.TP
-.B 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.
+switch back and forth between
+.B ext2
+and
+.BR ext3 .
+.RB See " ext3 " (5).
.TP
-.B vfat
-is an extended DOS filesystem used by Microsoft Windows95 and Windows NT.
-VFAT adds the capability to use long filenames under the MSDOS filesystem.
+.B ext4
+is a set of upgrades to
+.B ext3
+including substantial performance and
+reliability enhancements,
+plus large increases in volume, file, and directory size limits.
+.RB See " ext4 " (5).
.TP
-.B proc
-is a pseudo-filesystem which is used as an interface to kernel data
-structures rather than reading and interpreting
-.IR /dev/kmem .
-In particular, its files do not take disk space.
-See
-.BR proc (5).
+.B hpfs
+is the High Performance Filesystem, used in OS/2.
+This filesystem is
+read-only under Linux due to the lack of available documentation.
.TP
.B iso9660
is a CD-ROM filesystem type conforming to the ISO 9660 standard.
filesystem support under Linux.
.RE
.TP
-.B hpfs
-is the High Performance Filesystem, used in OS/2.
-This filesystem is
-read-only under Linux due to the lack of available documentation.
+.B JFS
+is a journaling filesystem, developed by IBM,
+that was integrated into Linux in kernel 2.4.24.
.TP
-.B sysv
-is an implementation of the SystemV/Coherent filesystem for Linux.
-It implements all of Xenix FS, SystemV/386 FS, and Coherent FS.
+.B minix
+is the filesystem used in the Minix operating system, the first to run
+under Linux.
+It has a number of shortcomings, including a 64MB partition size
+limit, short filenames, and a single timestamp.
+It remains useful for floppies and RAM disks.
+.TP
+.B msdos
+is the filesystem used by DOS, Windows, and some OS/2 computers.
+.B msdos
+filenames can be no longer than 8 characters, followed by an
+optional period and 3 character extension.
+.TP
+.B ncpfs
+is a network filesystem that supports the NCP protocol, used by
+Novell NetWare.
+.sp
+To use
+.BR ncpfs ,
+you need special programs, which can be found at
+.UR ftp://linux01.gwdg.de\:/pub\:/ncpfs
+.UE .
.TP
.B nfs
is the network filesystem used to access disks located on remote computers.
.TP
+.B ntfs
+replaces Microsoft Window's FAT filesystems (VFAT, FAT32).
+It has reliability, performance, and space-utilization enhancements
+plus features like ACLs, journaling, encryption, and so on.
+.TP
+.B proc
+is a pseudo filesystem which is used as an interface to kernel data
+structures rather than reading and interpreting
+.IR /dev/kmem .
+In particular, its files do not take disk space.
+See
+.BR proc (5).
+.TP
+.B Reiserfs
+is a journaling filesystem, designed by Hans Reiser,
+that was integrated into Linux in kernel 2.4.1.
+.TP
.B smb
is a network filesystem that supports the SMB protocol, used by
Windows for Workgroups, Windows NT, and Lan Manager.
.B smb
fs, you need a special mount program, which can be found in the ksmbfs
package, found at
-.IR ftp://sunsite.unc.edu/pub/Linux/system/Filesystems/smbfs .
+.UR ftp://sunsite.unc.edu\:/pub\:/Linux\:/system\:/Filesystems\:/smbfs
+.UE .
.TP
-.B ncpfs
-is a network filesystem that supports the NCP protocol, used by
-Novell NetWare.
-.sp
-To use
-.BR ncpfs ,
-you need special programs, which can be found at
-.IR ftp://linux01.gwdg.de/pub/ncpfs .
-.SH "SEE ALSO"
+.B sysv
+is an implementation of the SystemV/Coherent filesystem for Linux.
+It implements all of Xenix FS, SystemV/386 FS, and Coherent FS.
+.TP
+.B 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.
+.TP
+.B vfat
+is an extended DOS filesystem used by Microsoft Windows95 and Windows NT.
+.B vfat
+adds the capability to use long filenames under the MSDOS filesystem.
+.TP
+.B XFS
+is a journaling filesystem, developed by SGI,
+that was integrated into Linux in kernel 2.4.20.
+.TP
+.B 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
+.B xiafs
+filesystem is no longer actively developed or maintained.
+It was removed from the kernel in 2.1.21.
+.SH SEE ALSO
+.BR ext2 (5),
+.BR ext3 (5),
+.BR ext4 (5),
.BR proc (5),
.BR fsck (8),
.BR mkfs (8),
projects / thirdparty / man-pages.git / blobdiff