FILESYSTEMSSection: Linux Programmer's Manual (5)
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NAMEfilesystems - Linux filesystem types: minix, ext, ext2, ext3, xia, msdos, umsdos, vfat, proc, nfs, iso9660, hpfs, sysv, smb, ncpfs
DESCRIPTIONWhen, 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.
- 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.
- 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 It has been completely superseded by the second version of the extended filesystem (ext2) and has been removed from the kernel (in 2.1.21).
- 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.
- is a journaling version of the ext2 filesystem. It is easy to switch back and forth between ext2 and ext3.
- 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.
- 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.
- 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.
- is an extended DOS filesystem used by Microsoft Windows95 and Windows NT. VFAT adds the capability to use long filenames under the MSDOS filesystem.
- 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.
- High Sierra
- 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.
- 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.
- is the High Performance Filesystem, used in OS/2. This filesystem is read-only under Linux due to the lack of available documentation.
- is an implementation of the SystemV/Coherent filesystem for Linux. It implements all of Xenix FS, SystemV/386 FS, and Coherent FS.
- is the network filesystem used to access disks located on remote computers.
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 ftp://sunsite.unc.edu/pub/Linux/system/Filesystems/smbfs.
is a network filesystem that supports the NCP protocol, used by
To use ncpfs, you need special programs, which can be found at ftp://linux01.gwdg.de/pub/ncpfs.
SEE ALSOproc(5), fsck(8), mkfs(8), mount(8)