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In computing, a command is a directive to a computer program to perform a specific task. It may be issued via a command-line interface or as input to a network service as part of a network protocol, or as an event triggered in a graphical user interface.
Jul 21, 2016 · This post is in two parts: a little history, followed by some live command line examples. A Brief History Way back in the 1960s — 70s, computers were becoming more than just calculators.
In computing, a shell is a computer program that exposes an operating system 's services to a human user or other programs. In general, operating system shells use either a command-line interface (CLI) or graphical user interface (GUI), depending on a computer's role and particular operation.
A command-line interface (CLI) is a means of interacting with a computer program by inputting lines of text called command-lines. Command-line interfaces emerged in the mid-1960s, on computer terminals , as an interactive and more user-friendly alternative to the non-interactive interface available with punched cards .
Sep 23, 2021 · The Multics command processor used to be called the shell. This program is passed a command line for execution by the listener; it parses the line into a command name and arguments, locates the command and initiates it, and calls the command program with arguments that are PL/I character strings.
May 17, 2015 · According to a wikibook Operating System Design: "A command line interface or CLI is a method of interacting with a computer by giving it lines of textual commands (that is, a sequence of characters) either from keyboard input or from a script.
Jul 18, 2023 · What happened? In this article, we're going to look at: The history of early computing. How operating systems were developed. Modern operating systems. The development of kernels and shells. The history of shells. Why CLI tools are still important. The Early Days of Computers.
