Editing Unix File System (section)

{{Short description|File system used by many Unix and Unix-like operating systems}}
{{About|the file system implementation in some Unix and BSD operating systems|general Unix file system principles|Unix filesystem}}
{{Distinguish|text = [[Universal Flash Storage]], a storage device standard with the same abbreviation}}
{{Infobox filesystem
| full_name = UNIX file system
| name = UFS
| developer = [[Computer Systems Research Group|CSRG]]
| introduction_os = [[BSD|4.2BSD]]
| introduction_date = 
| partition_id = 
| directory_struct = tables
| file_struct = 
| bad_blocks_struct = 
| max_file_size = 2<sup>73</sup> bytes (8 [[Zebibyte|ZiB]])
| max_files_no = 
| max_filename_size = 255 bytes
| max_volume_size = 2<sup>73</sup> bytes (8 [[Zebibyte|ZiB]])
| filename_character_set = 
| dates_recorded = UFS1 and UFS2: last access time (atime), last modified time (mtime), last inode change time (ctime), UFS2: inode creation time (birthtime)<ref name=dinode>{{Cite web|url=https://svnweb.freebsd.org/base/head/sys/ufs/ufs/dinode.h?revision=313780&view=markup|title = &#91;base&#93; Contents of /Head/Sys/Ufs/Ufs/Dinode.h}}</ref>
| date_range = UFS1: December 14, 1901&ndash;January 18, 2038, UFS2: 64-bit signed integer offset from [[Unix time|epoch]]<ref name=dinode/>
| date_resolution = UFS1 and UFS2: Nanosecond<ref name=dinode/>
| forks_streams = 
| attributes = 
| file_system_permissions = 
| compression = 
| encryption = 
| OS = [[A/UX]], [[DragonFly BSD]], [[FreeBSD]], [[FreeNAS]], [[NAS4Free]], [[HP-UX]], [[NetBSD]], [[NeXTSTEP]], [[Linux]], [[OpenBSD]], [[illumos]], [[Solaris (operating system)|Solaris]], [[SunOS]], [[Tru64 UNIX]], [[UNIX System V]], [[Orbis OS]], and others
}}

The '''Unix file system''' ('''UFS''') is a family of [[file system]]s supported by many [[Unix]] and [[Unix-like]] operating systems.  It is a distant descendant of the original filesystem used by [[Version 7 Unix]].