File system used by many Unix and Unix-like operating systems
This article is about the file system implementation in some Unix and BSD operating systems. For general Unix file system principles, see Unix filesystem.
Not to be confused with Universal Flash Storage, a storage device standard with the same abbreviation.
UFS
Developer(s)
CSRG
Full name
UNIX file system
Introduced
with 4.2BSD
Structures
Directory contents
tables
Limits
Max volume size
273 bytes (8 ZiB)
Max file size
273 bytes (8 ZiB)
Max filename length
255 bytes
Features
Dates recorded
UFS1 and UFS2: last access time (atime), last modified time (mtime), last inode change time (ctime), UFS2: inode creation time (birthtime)[1]
Date range
UFS1: December 14, 1901–January 18, 2038, UFS2: 64-bit signed integer offset from epoch[1]
Date resolution
UFS1 and UFS2: Nanosecond[1]
Other
Supported operating systems
A/UX, DragonFly BSD, FreeBSD, FreeNAS, NAS4Free, HP-UX, NetBSD, NeXTSTEP, Linux, OpenBSD, illumos, Solaris, SunOS, Tru64 UNIX, UNIX System V, Orbis OS, and others
The Unix file system (UFS) is a family of file systems supported by many Unix and Unix-like operating systems. It is a distant descendant of the original filesystem used by Version 7 Unix.
^ abc"[base] Contents of /Head/Sys/Ufs/Ufs/Dinode.h".
The Unixfilesystem (UFS) is a family of filesystems supported by many Unix and Unix-like operating systems. It is a distant descendant of the original...
In Unix and operating systems inspired by it, the filesystem is considered a central component of the operating system. It was also one of the first parts...
The seven standard Unixfile types are regular, directory, symbolic link, FIFO special, block special, character special, and socket as defined by POSIX...
Unix (/ˈjuːnɪks/ , YOO-niks; trademarked as UNIX) is a family of multitasking, multi-user computer operating systems that derive from the original AT&T...
In Unix and Unix-like computer operating systems, a file descriptor (FD, less frequently fildes) is a process-unique identifier (handle) for a file or...
In Unix-like operating systems, a device file, device node, or special file is an interface to a device driver that appears in a filesystem as if it...
A Unix shell is a command-line interpreter or shell that provides a command line user interface for Unix-like operating systems. The shell is both an...
which system resources a user can access. The password file maps textual user names to UIDs. UIDs are stored in the inodes of the Unixfilesystem, running...
Unix version 1, along with the chmod system call. As systems grew in number and types of users, access-control lists were added to many filesystems in...
software interface for Unix and Unix-like computer operating systems that lets non-privileged users create their own filesystems without editing kernel...
Tanenbaum in the 1980s and aimed to replicate the structure of the UnixFileSystem while omitting complex features, and was intended to be a teaching...
Haiku operating system. Byte FileSystem (BFS) - filesystem used by z/VM for Unix applications Btrfs – is a copy-on-write filesystem for Linux announced...
originated as the system time of Unix operating systems. It has come to be widely used in other computer operating systems, filesystems, programming languages...
systems, aimed to run on modern Linux and other Unix-like operating systems. It is capable of representing filesystems in two ways: MapV mode: files...
UnixSystem V (pronounced: "System Five") is one of the first commercial versions of the Unix operating system. It was originally developed by AT&T and...
the layout of Unix-like systems. It has been made popular by its use in Linux distributions, but it is used by other Unix-like systems as well. It is...
result of a faulty file transfer, a disk error or non-malicious meddling. The md5sum program is included in most Unix-like operating systems or compatibility...
Remote File Sharing (RFS) is a Unix operating system component for sharing resources, such as files, devices, and filesystem directories, across a network...
Global Information