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...

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

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

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...

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...

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 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...

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...

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...

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...

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...

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...

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

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

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...

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

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

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...

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...

Unix, Plan 9, and Unix-like operating systems that evaluates conditional expressions. test was turned into a shell builtin command in 1981 with UNIX System...

example, the Unix program dd allows one to set the block size to be used during execution with the parameter bs=bytes. This specifies the size of the chunks...

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...

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...

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...

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...

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

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...

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...