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diff --git a/man5/filesystems.5 b/man5/filesystems.5 new file mode 100644 index 0000000..cc76699 --- /dev/null +++ b/man5/filesystems.5 @@ -0,0 +1,227 @@ +.\" Copyright 1996 Daniel Quinlan (Daniel.Quinlan@linux.org) +.\" +.\" SPDX-License-Identifier: GPL-2.0-or-later +.\" +.\" 2007-12-14 mtk Added Reiserfs, XFS, JFS. +.\" +.TH filesystems 5 2023-04-10 "Linux man-pages 6.05.01" +.nh +.SH NAME +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 +filesystem is mounted on +.IR /proc , +you can find in the file +.I /proc/filesystems +which filesystems your kernel currently supports; +see +.BR proc (5) +for more details. +There is also a legacy +.BR sysfs (2) +system call (whose availability is controlled by the +.\" commit: 6af9f7bf3c399e0ab1eee048e13572c6d4e15fe9 +.B CONFIG_SYSFS_SYSCALL +kernel build configuration option since Linux 3.15) +that enables enumeration of the currently available filesystem types +regardless of +.I /proc +availability and/or sanity. +.PP +If you need a currently unsupported filesystem, insert the corresponding +kernel module or recompile the kernel. +.PP +In order to use a filesystem, you have to +.I mount +it; see +.BR mount (2) +and +.BR mount (8). +.PP +The following list provides a +short description of the available or historically available +filesystems in the Linux kernel. +See the kernel documentation for a comprehensive +description of all options and limitations. +.TP +.B erofs +is the Enhanced Read-Only File System, stable since Linux 5.4. +.\" commit 47e4937a4a7ca4184fd282791dfee76c6799966a moves it out of staging +See +.BR erofs (5). +.TP +.B ext +is an elaborate extension of the +.B minix +filesystem. +It has been completely superseded by the second version +of the extended filesystem +.RB ( ext2 ) +and has been removed from the kernel (in Linux 2.1.21). +.TP +.B ext2 +is a disk filesystem that was used by Linux for fixed disks +as well as removable media. +The second extended filesystem was designed as an extension of the +extended filesystem +.RB ( ext ). +See +.BR ext2 (5). +.TP +.B ext3 +is a journaling version of the +.B ext2 +filesystem. +It is easy to +switch back and forth between +.B ext2 +and +.BR ext3 . +See +.BR ext3 (5). +.TP +.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. +See +.BR ext4 (5). +.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. +.TP +.B iso9660 +is a CD-ROM filesystem type conforming to the ISO 9660 standard. +.RS +.TP +.B "High Sierra" +Linux supports High Sierra, the precursor to the ISO 9660 standard for +CD-ROM filesystems. +It is automatically recognized within the +.B iso9660 +filesystem support under Linux. +.TP +.B "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 +.B 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 +.B iso9660 +filesystem support under Linux. +.RE +.TP +.B JFS +is a journaling filesystem, developed by IBM, +that was integrated into Linux 2.4.24. +.TP +.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 64\ MB 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. +It was removed from the kernel in Linux 4.17. +.IP +To use +.BR ncpfs , +you need special programs, which can be found at +.UR ftp://ftp.gwdg.de\:/pub\:/linux\:/misc\:/ncpfs +.UE . +.TP +.B nfs +is the network filesystem used to access disks located on remote computers. +.TP +.B ntfs +is the filesystem native to Microsoft Windows NT, +supporting 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 2.4.1. +.TP +.B smb +is a network filesystem that supports the SMB protocol, used by +Windows. +See +.UR https://www.samba.org\:/samba\:/smbfs/ +.UE . +.TP +.B sysv +is an implementation of the System V/Coherent filesystem for Linux. +It implements all of Xenix FS, System V/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 tmpfs +is a filesystem whose contents reside in virtual memory. +Since the files on such filesystems typically reside in RAM, +file access is extremely fast. +See +.BR tmpfs (5). +.TP +.B vfat +is an extended FAT 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 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 Linux 2.1.21. +.SH SEE ALSO +.BR fuse (4), +.BR btrfs (5), +.BR ext2 (5), +.BR ext3 (5), +.BR ext4 (5), +.BR nfs (5), +.BR proc (5), +.BR sysfs (5), +.BR tmpfs (5), +.BR xfs (5), +.BR fsck (8), +.BR mkfs (8), +.BR mount (8) |