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...

In Unix and operating systems inspired by it, the file system is considered a central component of the operating system. It was also one of the first parts...

The Unix file types are the categories of file formats that a Unix-based system uses to provide context-sensitive behavior of file system items – all...

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...

originated in AT&T Unix version 1 and was exclusive to Unix and Unix-like operating systems until it was ported to other operating systems such as Windows...

labels with file system creation and extraction programs, but no kernel support exists. System V Release 4, and some other Unix systems, retrofitted...

clone of SGI's fsn file manager for IRIX systems, aimed to run on modern Linux and other Unix-like operating systems. While not officially deprecated, the...

A Unix shell is a shell that provides a command-line user interface for a Unix-like operating system. A Unix shell provides a command language that can...

space on file systems on which the user has read access. df is typically implemented using the statfs() or statvfs() system calls. The Single Unix Specification...

stat() is a Unix system call that queries the file system for metadata about a file (including special files such as directories). The metadata contains...

In Unix-like operating systems, a device file, device node, or special file is an interface to a device driver that appears in a file system as if it...

z/OS UNIX System Services (z/OS UNIX, or informally USS) is a base element of z/OS. z/OS UNIX is a certified UNIX operating system implementation (XPG4...

which system resources a user can access. The password file maps textual user names to UIDs. UIDs are stored in the inodes of the Unix file system, running...

of the file system itself and may limit the length and format of the extension, while others, such as Unix file systems, the VFAT file system, and NTFS...

Unix System V (pronounced: "System Five") is one of the first commercial versions of the Unix operating system. It was originally developed by AT&T and...

Tanenbaum in the 1980s and aimed to replicate the structure of the Unix File System while omitting complex features, and was intended to be a teaching...

widely available in the early 1990s, getting a new file system deployed for Unix-like operating systems was more difficult, so the one- to two-year delay...

executing in the same Unix or Unix-like operating system. The name Unix domain socket refers to the domain argument value AF_UNIX that is passed to the...

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...

program on Unix and Unix-like operating systems used to display the beginning of a text file or piped data. The command syntax is: head [options] ⟨file_name⟩...

Unix epoch. For example, at midnight on 1 January 2010, Unix time was 1262304000. Unix time originated as the system time of Unix operating systems....

byte-range advisory Network Lock Manager (NLM) protocol (added to support UNIX System V file locking APIs) the remote quota-reporting (RQUOTAD) protocol, which...

(index node) is a data structure in a Unix-style file system that describes a file-system object such as a file or a directory. Each inode stores the...

bring the file back if its storage was not reused. Originally, developed for Unix, today it is also available on Unix-like and non Unix-like systems, KolibriOS...

is a shell command for reporting file system storage use – space used for a file or a directory tree. The Single UNIX Specification (SUS) specifies that...

The system utility fsck (file system check) is a tool for checking the consistency of a file system in Unix and Unix-like operating systems, such as Linux...

(after file systems table) is a system file commonly found in the directory /etc on Unix and Unix-like computer systems. The /etc/fstab file is used...

In computing, tty is a command in Unix and Unix-like operating systems to print the file name of the terminal connected to standard input. tty stands for...

In the Unix operating system, shar (from "shell archive") is an archive format created with the Unix shar utility. A shar file is a type of self-extracting...

failure or system crash) between writes to leave data structures in an invalid intermediate state. For example, deleting a file on a Unix file system involves...