{ "content": [ { "type": "text", "text": "# FILESYSTEMS(5) (man)\n\n**Summary:** filesystems - Linux filesystem types: ext, ext2, ext3, ext4, hpfs, iso9660, JFS, minix, msdos, ncpfs nfs, ntfs, proc, Reiserfs, smb, sysv, umsdos, vfat, XFS, xiafs\n\n## See Also\n\n- fuse(4)\n- btrfs(5)\n- ext2(5)\n- ext3(5)\n- ext4(5)\n- nfs(5)\n- proc(5)\n- sysfs(5)\n- tmpfs(5)\n- xfs(5)\n- fsck(8)\n- mkfs(8)\n- mount(8)\n\n## Section Outline\n\n- **NAME** (3 lines)\n- **DESCRIPTION** (101 lines)\n- **SEE ALSO** (3 lines)\n- **COLOPHON** (7 lines)\n\n## Full Content\n\n### NAME\n\nfilesystems - Linux filesystem types: ext, ext2, ext3, ext4, hpfs, iso9660, JFS, minix,\nmsdos, ncpfs nfs, ntfs, proc, Reiserfs, smb, sysv, umsdos, vfat, XFS, xiafs\n\n### DESCRIPTION\n\nWhen, as is customary, the proc filesystem is mounted on /proc, you can find in the file\n/proc/filesystems which filesystems your kernel currently supports; see proc(5) for more\ndetails. There is also a legacy sysfs(2) system call (whose availability is controlled by\nthe CONFIGSYSFSSYSCALL kernel build configuration option since Linux 3.15) that enables\nenumeration of the currently available filesystem types regardless of /proc availability\nand/or sanity.\n\nIf you need a currently unsupported filesystem, insert the corresponding kernel module or\nrecompile the kernel.\n\nIn order to use a filesystem, you have to mount it; see mount(2) and mount(8).\n\nThe following list provides a short description of the available or historically available\nfilesystems in the Linux kernel. See the kernel documentation for a comprehensive\ndescription of all options and limitations.\n\next is an elaborate extension of the minix filesystem. It has been completely\nsuperseded by the second version of the extended filesystem (ext2) and has been\nremoved from the kernel (in 2.1.21).\n\next2 is the high performance disk filesystem used by Linux for fixed disks as well as\nremovable media. The second extended filesystem was designed as an extension of\nthe extended filesystem (ext). See ext2(5).\n\next3 is a journaling version of the ext2 filesystem. It is easy to switch back and\nforth between ext2 and ext3. See ext3(5).\n\next4 is a set of upgrades to ext3 including substantial performance and reliability\nenhancements, plus large increases in volume, file, and directory size limits. See\next4(5).\n\nhpfs is the High Performance Filesystem, used in OS/2. This filesystem is read-only\nunder Linux due to the lack of available documentation.\n\niso9660 is a CD-ROM filesystem type conforming to the ISO 9660 standard.\n\nHigh Sierra\nLinux supports High Sierra, the precursor to the ISO 9660 standard for CD-\nROM filesystems. It is automatically recognized within the iso9660\nfilesystem support under Linux.\n\nRock Ridge\nLinux also supports the System Use Sharing Protocol records specified by the\nRock Ridge Interchange Protocol. They are used to further describe the\nfiles in the iso9660 filesystem to a UNIX host, and provide information such\nas long filenames, UID/GID, POSIX permissions, and devices. It is\nautomatically recognized within the iso9660 filesystem support under Linux.\n\nJFS is a journaling filesystem, developed by IBM, that was integrated into Linux in\nkernel 2.4.24.\n\nminix is the filesystem used in the Minix operating system, the first to run under Linux.\nIt has a number of shortcomings, including a 64 MB partition size limit, short\nfilenames, and a single timestamp. It remains useful for floppies and RAM disks.\n\nmsdos is the filesystem used by DOS, Windows, and some OS/2 computers. msdos filenames\ncan be no longer than 8 characters, followed by an optional period and 3 character\nextension.\n\nncpfs is a network filesystem that supports the NCP protocol, used by Novell NetWare. It\nwas was removed from the kernel in 4.17.\n\nTo use ncpfs, you need special programs, which can be found at ⟨ftp://ftp.gwdg.de\n/pub/linux/misc/ncpfs⟩.\n\nnfs is the network filesystem used to access disks located on remote computers.\n\nntfs is the filesystem native to Microsoft Windows NT, supporting features like ACLs,\njournaling, encryption, and so on.\n\nproc is a pseudo filesystem which is used as an interface to kernel data structures\nrather than reading and interpreting /dev/kmem. In particular, its files do not\ntake disk space. See proc(5).\n\nReiserfs is a journaling filesystem, designed by Hans Reiser, that was integrated into Linux\nin kernel 2.4.1.\n\nsmb is a network filesystem that supports the SMB protocol, used by Windows for Work‐\ngroups, Windows NT, and Lan Manager. See ⟨https://www.samba.org/samba/smbfs/⟩.\n\nsysv is an implementation of the System V/Coherent filesystem for Linux. It implements\nall of Xenix FS, System V/386 FS, and Coherent FS.\n\numsdos is an extended DOS filesystem used by Linux. It adds capability for long file‐\nnames, UID/GID, POSIX permissions, and special files (devices, named pipes, etc.)\nunder the DOS filesystem, without sacrificing compatibility with DOS.\n\ntmpfs is a filesystem whose contents reside in virtual memory. Since the files on such\nfilesystems typically reside in RAM, file access is extremely fast. See tmpfs(5).\n\nvfat is an extended FAT filesystem used by Microsoft Windows95 and Windows NT. vfat\nadds the capability to use long filenames under the MSDOS filesystem.\n\nXFS is a journaling filesystem, developed by SGI, that was integrated into Linux in\nkernel 2.4.20.\n\nxiafs was designed and implemented to be a stable, safe filesystem by extending the Minix\nfilesystem code. It provides the basic most requested features without undue com‐\nplexity. The xiafs filesystem is no longer actively developed or maintained. It\nwas removed from the kernel in 2.1.21.\n\n### SEE ALSO\n\nfuse(4), btrfs(5), ext2(5), ext3(5), ext4(5), nfs(5), proc(5), sysfs(5), tmpfs(5), xfs(5),\nfsck(8), mkfs(8), mount(8)\n\n### COLOPHON\n\nThis page is part of release 5.10 of the Linux man-pages project. A description of the\nproject, information about reporting bugs, and the latest version of this page, can be found\nat https://www.kernel.org/doc/man-pages/.\n\n\n\nLinux 2020-12-21 FILESYSTEMS(5)\n\n" } ], "structuredContent": { "command": "FILESYSTEMS", "section": "5", "mode": "man", "summary": "filesystems - Linux filesystem types: ext, ext2, ext3, ext4, hpfs, iso9660, JFS, minix, msdos, ncpfs nfs, ntfs, proc, Reiserfs, smb, sysv, umsdos, vfat, XFS, xiafs", "synopsis": null, "flags": [], "examples": [], "see_also": [ { "name": "fuse", "section": "4", "url": "https://www.chedong.com/phpMan.php/man/fuse/4/json" }, { "name": "btrfs", "section": "5", "url": "https://www.chedong.com/phpMan.php/man/btrfs/5/json" }, { "name": "ext2", "section": "5", "url": "https://www.chedong.com/phpMan.php/man/ext2/5/json" }, { "name": "ext3", "section": "5", "url": "https://www.chedong.com/phpMan.php/man/ext3/5/json" }, { "name": "ext4", "section": "5", "url": "https://www.chedong.com/phpMan.php/man/ext4/5/json" }, { "name": "nfs", "section": "5", "url": "https://www.chedong.com/phpMan.php/man/nfs/5/json" }, { "name": "proc", "section": "5", "url": "https://www.chedong.com/phpMan.php/man/proc/5/json" }, { "name": "sysfs", "section": "5", "url": "https://www.chedong.com/phpMan.php/man/sysfs/5/json" }, { "name": "tmpfs", "section": "5", "url": "https://www.chedong.com/phpMan.php/man/tmpfs/5/json" }, { "name": "xfs", "section": "5", "url": "https://www.chedong.com/phpMan.php/man/xfs/5/json" }, { "name": "fsck", "section": "8", "url": "https://www.chedong.com/phpMan.php/man/fsck/8/json" }, { "name": "mkfs", "section": "8", "url": "https://www.chedong.com/phpMan.php/man/mkfs/8/json" }, { "name": "mount", "section": "8", "url": "https://www.chedong.com/phpMan.php/man/mount/8/json" } ], "section_outline": [ { "name": "NAME", "lines": 3, "subsections": [] }, { "name": "DESCRIPTION", "lines": 101, "subsections": [] }, { "name": "SEE ALSO", "lines": 3, "subsections": [] }, { "name": "COLOPHON", "lines": 7, "subsections": [] } ] } }