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...

typically implemented using the statfs() or statvfs() system calls. The Single Unix Specification (SUS) specifies that space is reported in blocks of 512 bytes...

converting file data. Originally developed for Unix, it has been implemented on many other environments including Unix-like operating systems, Windows, Plan 9...

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 philosophy, originated by Ken Thompson, is a set of cultural norms and philosophical approaches to minimalist, modular software development. It...

which is part of the Single UNIX Specification (SUS). These commands are implemented in many shells on modern Unix, Unix-like and other operating systems...

Version 1 Unix. It is among the few original Unix system calls to change, with Version 4's addition of group permissions and larger file size. Since at...

developed for Unix and later codified by POSIX and Single UNIX Specification, it is supported in many operating systems today, including Unix-like variants...

Single UNIX Specification (SUS) is a standard for computer operating systems, compliance with which is required to qualify for using the "UNIX" trademark...

files as a single archive file. Originally developed for Unix, it is widely available on Unix-based systems, and similar commands are available on other...

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

Research Unix refers to the early versions of the Unix operating system for DEC PDP-7, PDP-11, VAX and Interdata 7/32 and 8/32 computers, developed in...

is called a "diff", or a patch, since the output can be applied with the Unix program patch. The output of similar file comparison utilities is also called...

storage was not reused. Originally, developed for Unix, today it is also available on Unix-like and non Unix-like systems, KolibriOS, IBM i, EFI shell. and...

most Unix text editors/viewers, less does not need to read the entire file before starting, allowing for immediate viewing regardless of file size. Mark...

wc (short for word count) is a command in Unix, Plan 9, Inferno, and Unix-like operating systems. The program reads either standard input or a list of...

5% of the total file system size. For more info see core utils faq. The du command first appeared in version 1 of AT&T UNIX. The implementation of du bundled...

In Unix-like computer operating systems, a pipeline is a mechanism for inter-process communication using message passing. A pipeline is a set of processes...

interactive command interpreter and command programming language developed for UNIX-like operating systems. Created in 1989 by Brian Fox for the GNU Project...

In computing, cmp is a command-line utility on Unix and Unix-like operating systems that compares two files of any type and writes the results to the...

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...

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...

UUCP (Unix-to-Unix Copy) is a suite of computer programs and protocols allowing remote execution of commands and transfer of files, email and netnews between...

The history of Unix dates back to the mid-1960s, when the Massachusetts Institute of Technology, Bell Labs, and General Electric were jointly developing...

split is a utility on Unix, Plan 9, and Unix-like operating systems most commonly used to split a computer file into two or more smaller files. The split...

In Unix-like operating systems, find is a command-line utility that locates files based on some user-specified criteria and either prints the pathname...

A Unix architecture is a computer operating system system architecture that embodies the Unix philosophy. It may adhere to standards such as the Single...

In computing, sort is a standard command line program of Unix and Unix-like operating systems, that prints the lines of its input or concatenation of...

HP-UX (from "Hewlett Packard Unix") is a proprietary implementation of the Unix operating system developed by Hewlett Packard Enterprise; current versions...

zero-filled records. (The origin of tar's record size appears to be the 512-byte disk sectors used in the Version 7 Unix file system.) The final block of an archive...