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

A Unix-like (sometimes referred to as UN*X or *nix) operating system is one that behaves in a manner similar to a Unix system, although not necessarily...

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

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

manual page) is a form of software documentation usually found on a Unix or Unix-like operating system. Topics covered include computer programs (including...

Distribution (BSD) is a discontinued operating system based on Research Unix, developed and distributed by the Computer Systems Research Group (CSRG)...

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...

cat is a standard Unix utility that reads files sequentially, writing them to standard output. The name is derived from its function to (con)catenate files...

When a text 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...

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...