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   What is a command in computer programming?

   • 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 . Specifically, the term command is used in imperative programming languages.

   Command (computing) - Wikipedia

   en.wikipedia.org/wiki/Command_(computing)

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   What is a command line operating system?

   • Command line shells: the user types commands at the prompt. Menu driven shells: the user selects commands from menus. Graphical user interface shells: the user selects graphical menus and icons. Examples of command line operating systems are UNIX and Disk Operating System (DOS). Examples of menu driven operating systems are the DOS shell.

   Shell (computing) - Simple English Wikipedia, the free encyclopedia

   simple.wikipedia.org/wiki/Shell_(computing)

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   How does the user give commands to the operating system?

   • The user gives commands to the operating system through its shell. In simple words - a shell is a program that accepts the input from users and excutes program on their behalf by creating a new process, and whatever the response from that particular program - which could be input, output or error - it shows back it the the user.

   Shell (computing) - Simple English Wikipedia, the free encyclopedia

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   What is an operating system command-line interface?

   • Operating system (OS) command-line interfaces are usually distinct programs supplied with the operating system. A program that implements such a text interface is often called a command-line interpreter, command processor or shell .

   Command-line interface - Wikipedia

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2. en.wikipedia.org › wiki › Command_(computing)Command (computing) - Wikipedia

   en.wikipedia.org › wiki › Command_(computing)

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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 .

   • Shell (computing) - Wikipedia

     In computing, a shell is a computer program that exposes an...

   • Command-line interface - Wikipedia

     A command-line interface ( CLI) is a means of interacting...

   • Shell (computing) - Simple English Wikipedia, the free ...

     In simple words - a shell is a program that accepts the...

   • Command - Wikipedia

     Military. Music. Sports. Other uses. See also. Command. Look...

3. www.freecodecamp.org › news › the-command-line-1fdbcA Brief History of the Command Line - freeCodeCamp.org

   www.freecodecamp.org › news › the-command-line-1fdbc

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   Jul 21, 2016 · A Brief History. Way back in the 1960s — 70s, computers were becoming more than just calculators. They could save files to disk and have multiple running applications with multiple users. But these things were difficult to control and easy to break. Thankfully, there was a very smart idea to cover all these internal bits in a nice, usable shell.

4. en.wikibooks.org › wiki › Computer_Science_DesignCommand - Wikibooks, open books for an open world

   en.wikibooks.org › wiki › Computer_Science_Design

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   May 3, 2023 · Command. The command pattern is an object behavioural pattern that decouples sender and receiver. It can also be thought as an object-oriented equivalent of a call back method. Call back: It is a function that is registered to be called at a later point of time based on user actions.