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...

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 of...

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...

file is shell command for reporting the type of data contained in a file. It is commonly supported in Unix and Unix-like operating systems. As the command...

Unix (/ˈjuːnɪks/ , YOO-niks; trademarked as UNIX) is a family of multitasking, multi-user computer operating systems that derive from the original AT&T...

1970, the Unix epoch. For example, at midnight on 1 January 2010, Unix time was 1262304000. Unix time originated as the system time of Unix operating...

developed for Unix, it is available on many operating systems and shells today. In addition to combining files, cat is commonly used to copy files and in particular...

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...

developed for Unix and later codified by POSIX. Another common technology is an access-control list (ACL) with multiple variants implemented in file systems...

mv is a Unix command that moves one or more files or directories from one place to another. If both filenames are on the same filesystem, this results...

writing and converting file data. Originally developed for Unix, it has been ported to many other operating systems (OSs) including Unix-like OSs, Windows...

(short for manual page) is a form of software documentation found on Unix and Unix-like operating systems. Topics covered include programs, system libraries...

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 were...

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...

The command was introduced to Unix in January 1979, replacing the tp program (which in turn replaced "tap"). The file structure was standardized in POSIX...

A shell script is a computer program designed to be run by a Unix shell, a command-line interpreter. The various dialects of shell scripts are considered...

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 ln command is a standard Unix command utility used to create a hard link or a symbolic link (symlink) to an existing file or directory. The use of a...

shell command on Unix and Unix-like operating systems used to remove files (which includes special files such as directories) from the file system. The rm...

"Everything is a file" is an approach to interface design in Unix derivatives. While this turn of phrase does not as such figure as a Unix design principle...

In computing, cp is a command in various Unix and Unix-like operating systems for copying files and directories. The command has three principal modes...

In a computer file system, and primarily used in the Unix and Unix-like operating systems, the root directory is the first or top-most directory in a hierarchy...

patch is a Unix program that updates text files according to instructions contained in a separate file, called a patch file. The patch file (also called...

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...

a Unix utility that maintains groups of files as a single archive file. Today, ar is generally used only to create and update static library files that...

file with a shebang is used as if it were an executable in a Unix-like operating system, the program loader mechanism parses the rest of the file's initial...

logic and often fewer build files. Make is widely used in part due to its early inclusion in Unix, starting with PWB/UNIX 1.0, which featured a variety...

Unix security refers to the means of securing a Unix or Unix-like operating system. A core security feature in these systems is the file system permissions...

for listing files – including special files such as directories. Originally developed for Unix and later codified by POSIX and Single UNIX Specification...

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 interactive...