Directory structure used by a Unix-like operating system
"Usr" redirects here. For other uses, see USR.
"Unix file system" redirects here. For UFS, a specific file system used by many Unix and Unix-like operating systems, see Unix File System.
Version 7 Unix filesystem layout: subdirectories of "/" and "/usr"An overview of a Unix filesystem layout
In Unix and operating systems inspired by it, the file system is considered a central component of the operating system.[1] It was also one of the first parts of the system to be designed and implemented by Ken Thompson in the first experimental version of Unix, dated 1969.[2]
As in other operating systems, the filesystem provides information storage and retrieval, and one of several forms of interprocess communication, in that the many small programs that traditionally form a Unix system can store information in files so that other programs can read them, although pipes complemented it in this role starting with the Third Edition. Also, the filesystem provides access to other resources through so-called device files that are entry points to terminals, printers, and mice.
The rest of this article uses Unix as a generic name to refer to both the original Unix operating system and its many workalikes.
^Ritchie, D.M.; Thompson, K. (July 1978). "The UNIX Time-Sharing System". Bell System Tech. J. 57 (6): 1905–1929. CiteSeerX 10.1.1.112.595. doi:10.1002/j.1538-7305.1978.tb02136.x.
^Cite error: The named reference evolution was invoked but never defined (see the help page).
Thompson in the first experimental version of Unix, dated 1969. As in other operating systems, the filesystem provides information storage and retrieval...
Filesystem in Userspace (FUSE) is a software interface for Unix and Unix-like computer operating systems that lets non-privileged users create their own...
The Filesystem Hierarchy Standard (FHS) is a reference describing the conventions used for the layout of Unix-like systems. It has been made popular by...
operating systems. It is a distant descendant of the original filesystem used by Version 7 Unix. A UFS volume is composed of the following parts: A few blocks...
directory is located; it is the filesystem on top of which all other file systems are mounted as the system boots up. Unix abstracts the nature of this tree...
Current Unix time 1715607589 (update) 2024-05-13T13:39:49+00:00 Unix time is a date and time representation widely used in computing. It measures time...
used to bridge the differences in Windows, classic Mac OS/macOS and Unixfilesystems, so that applications can access files on local file systems of those...
Unix systems operating on the same CPU architecture. The Filesystem Hierarchy Standard was created to provide a reference directory layout for Unix-like...
the original FAT filesystem format, and in the provision of Unix file semantics that do not exist as standard in the FAT filesystem format such as file...
the Linux kernel. It has metadata structure inspired by traditional Unixfilesystem principles, and was designed by Rémy Card to overcome certain limitations...
InfiniBand. There are different architectural approaches to a shared-disk filesystem. Some distribute file information across all the servers in a cluster...
applications List of Unix daemons List of web browsers for Unix and Unix-like operating systems Unix philosophy util-linux The Wikibook Guide to UNIX has a page...
the root directory of a Unix system. This directory was originally considered to be root's home directory, but the UNIXFilesystem Hierarchy Standard now...
permissions. All files in a typical Unixfilesystem have permissions set enabling different access to a file. Unix permissions permit different users access...
The proc filesystem (procfs) is a special filesystem in Unix-like operating systems that presents information about processes and other system information...
[Usenet; common] Fucking, in the expletive sense (it refers to the Unixfilesystem-repair command fsck(1), of which it can be said that if you have to...
system calls in the st_nlink field of struct stat. To prevent loops in the filesystem, and to keep the interpretation of the ".." file (parent directory) consistent...
From release V5.0 Tru64 UNIX offered a clustering facility named TruCluster Server. TruCluster utilised a cluster-wide filesystem visible to each cluster...
name space. The shared name space (usually mounted as /afs on the Unixfilesystem) is identical on all workstations. The local name space is unique to...
compatibility at the operating system level. It occurs when a filename on a filesystem appears in a form incompatible with the operating system accessing it...
19 January 2038. The problem exists in systems which measure Unix time – the number of seconds elapsed since the Unix epoch (00:00:00 UTC on 1 January 1970) – and store...
Subversion filesystem as "two-dimensional". Two coordinates are used to unambiguously address filesystem items: Path (regular path of Unix-like OS filesystem) Revision...
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