{
    "mode": "man",
    "parameter": "fs",
    "section": "5",
    "url": "https://www.chedong.com/phpMan.php/man/fs/5/json",
    "generated": "2026-09-13T04:35:47Z",
    "sections": {
        "NAME": {
            "content": "filesystems  -  Linux  filesystem  types:  ext,  ext2, ext3, ext4, hpfs, iso9660, JFS, minix,\nmsdos, ncpfs nfs, ntfs, proc, Reiserfs, smb, sysv, umsdos, vfat, XFS, xiafs\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "When, 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\nerofs  is the Enhanced Read-Only File System, stable since Linux 5.4.  See erofs(5).\n\next    is an elaborate extension of the minix filesystem.  It has been completely  superseded\nby  the second version of the extended filesystem (ext2) and has been removed from the\nkernel (in Linux 2.1.21).\n\next2   is a disk filesystem that was used by Linux for  fixed  disks  as  well  as  removable\nmedia.   The  second  extended filesystem was designed as an extension of the extended\nfilesystem (ext).  See ext2(5).\n\next3   is a journaling version of the ext2 filesystem.  It is easy to switch back  and  forth\nbetween 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 under\nLinux due to the lack of available documentation.\n",
            "subsections": [
                {
                    "name": "iso9660",
                    "content": "is a CD-ROM filesystem type conforming to the ISO/IEC 9660 standard.\n\nHigh Sierra\nLinux supports High Sierra, the precursor to the ISO/IEC 9660 standard for  CD-\nROM  filesystems.  It is automatically recognized within the iso9660 filesystem\nsupport 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 files\nin the iso9660 filesystem to a UNIX host, and provide information such as  long\nfilenames,  UID/GID,  POSIX  permissions,  and  devices.   It  is automatically\nrecognized within the iso9660 filesystem support under Linux.\n\nJFS    is a journaling filesystem, developed by IBM, that was integrated into Linux 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  can\nbe  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 removed from the kernel in Linux 4.17.\n\nTo  use  ncpfs, you need special programs, which can be found at \u001b]8;;ftp://ftp.gwdg.de/pub/linux/misc/ncpfs\u001b\\ftp://ftp.gwdg.de/pub\n/linux/misc/ncpfs\u001b]8;;\u001b\\.\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 rather\nthan reading and interpreting /dev/kmem.  In particular, its files do  not  take  disk\nspace.  See proc(5).\n"
                },
                {
                    "name": "Reiserfs",
                    "content": "is  a  journaling  filesystem, designed by Hans Reiser, that was integrated into Linux\n2.4.1.\n\nsmb    is a network filesystem  that  supports  the  SMB  protocol,  used  by  Windows.   See\n\u001b]8;;https://www.samba.org/samba/smbfs/\u001b\\https://www.samba.org/samba/smbfs/\u001b]8;;\u001b\\.\n\nsysv   is an implementation of the System V/Coherent filesystem for Linux.  It implements all\nof Xenix FS, System V/386 FS, and Coherent FS.\n\numsdos is  an  extended DOS filesystem used by Linux.  It adds capability for long filenames,\nUID/GID, POSIX permissions, and special files (devices, named pipes, etc.)  under  the\nDOS 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  adds\nthe capability to use long filenames under the MSDOS filesystem.\n\nXFS    is a journaling filesystem, developed by SGI, that was integrated into Linux 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\ncomplexity.   The  xiafs filesystem is no longer actively developed or maintained.  It\nwas removed from the kernel in Linux 2.1.21.\n"
                }
            ]
        },
        "SEE ALSO": {
            "content": "fuse(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\nLinux man-pages 6.7                          2024-01-28                               filesystems(5)",
            "subsections": []
        }
    },
    "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",
    "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"
        }
    ]
}