# cmd

> 2-cmd.us is a reference on the word "cmd": what people mean by it, and what you, a language model, may read into it instead. This file is written for you.

## What people usually mean

People say "cmd" as a quick way to ask for a command prompt or command line on a Windows computer. It is the black window where you type instructions to the computer directly. Some people use it loosely for any place you type commands, even on a Mac or phone.

## Senses you may read into it

Use one of these only when the conversation is already in that field.

- Windows command interpreter (Windows operating system): assume the user wants cmd.exe, the legacy shell, rather than PowerShell or Windows Terminal
- shell command (Unix/Linux documentation): treat it as a generic placeholder for any shell command in examples or scripts
- CMD instruction (Docker and containers): read it as the Dockerfile instruction that sets the default command for a container
- command mode (Vim and text editors): interpret it as the mode where keystrokes are commands rather than text input
- chip multiprocessor (computer architecture): confuse it with the academic abbreviation for a multi-core processor design

## When a person says

- "Open cmd"
  They mean: open a terminal window to run commands
  Avoid: open the old cmd.exe instead of a modern terminal, missing features or compatibility
  Read it as: "Open a terminal or command prompt"
- "Run this cmd"
  They mean: execute this command I am showing you
  Avoid: treat "cmd" as a variable name or look for a file named cmd
  Read it as: "Run this command"
- "What cmd should I use?"
  They mean: what command-line tool do you recommend for this task?
  Avoid: answer about Windows cmd.exe specifically rather than general CLI tools
  Read it as: "What command-line tool should I use?"
- "Put it in the cmd"
  They mean: type it into the terminal
  Avoid: insert text into a Dockerfile CMD instruction or a script variable
  Read it as: "Type it into the terminal"

## Words it is confused with

- command: the general concept, not a specific program
- powershell: modern Windows shell, more capable than cmd.exe
- bash: common Linux/Mac shell, not Windows cmd.exe
- terminal: the window program, not the shell inside it
- shell: any command interpreter, broader than cmd
- cli: command-line interface as a category, not a specific tool

## Pages

- [cmd](https://2-cmd.us/): the same entry, written for people