FILESYSTEMS(5) Linux Programmer's Manual FILESYSTEMS(5)
filesystems - Linux filesystem types: minix, ext, ext2, ext3, xia,
msdos, umsdos, vfat, proc, nfs, iso9660, hpfs, sysv, smb, ncpfs
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. If you need a currently unsupported one, insert
the corresponding module or recompile the kernel.
In order to use a filesystem, you have to mount it, see mount(8) for
the mount command, and for the available mount options.
Below a short description of a few of the available filesystems.
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.
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completely superseded by the second version of the extended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
ext2 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 (ext). ext2 offers the best performance (in terms of
speed and CPU usage) of the filesystems supported under Linux.
ext3 is a journaling version of the ext2 filesystem. It is easy to
switch back and forth between ext2 and ext3. ext3 offers the
most complete set of journaling options available among
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 xia filesystem
is no longer actively developed or maintained. It was removed
from the kernel in 2.1.21.
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.
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.
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.
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).
is a CD-ROM filesystem type conforming to the ISO 9660 standard.
Linux supports High Sierra, the precursor to the ISO 9660
standard for CD-ROM filesystems. It is automatically
recognized within the iso9660 filesystem support under
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.
hpfs is the High Performance Filesystem, used in OS/2. This
filesystem is read-only under Linux due to the lack of available
sysv is an implementation of the SystemV/Coherent filesystem for
Linux. It implements all of Xenix FS, SystemV/386 FS, and
nfs is the network filesystem used to access disks located on remote
smb is a network filesystem that supports the SMB protocol, used by
Windows for Workgroups, Windows NT, and Lan Manager.
To use smb fs, you need a special mount program, which can be
found in the ksmbfs package, found at
ncpfs is a network filesystem that supports the NCP protocol, used by
To use ncpfs, you need special programs, which can be found at
proc(5), fsck(8), mkfs(8), mount(8)