Definition

1. Noun:
   • A direct instruction given by a user to a computer's operating system: A "system command" is a specific instruction, typically entered via a command-line interface, that requests an immediate action from the computer's core executive or supervisory program. It is a directive from the user, not a pre-written line of code within an application program.

Usage

• A "system command" is used to directly control or query the operating system's functions, such as managing files, processes, or system settings.
• It is executed in a command-line environment (e.g., Terminal, Command Prompt).
• This term distinguishes user-entered instructions from the internal commands executed by application software.

Examples

• Noun:
  • The administrator entered a system command to restart the network service.
  • Using the correct system command, you can list all files in a directory.
  • Forgetting a parameter in a system command can sometimes lead to an error.

Advanced Usage

• "to issue/execute a system command": The act of typing and running the command.
  • You need administrator privileges to execute that particular system command.
• "command-line interface (CLI)": The primary environment where system commands are used.
  • Advanced users often prefer the efficiency of a command-line interface for entering system commands.

Variants and Related Words

• Command (n): A broader term for any instruction given to a computer. A "system command" is a specific type of command.
  • The program responds to voice commands.
• Command prompt (n): The symbol or line on a screen indicating where a system command can be entered.
  • Type your command at the prompt and press Enter.
• Shell (n): A user interface that provides access to system commands and services.
  • The Bash shell is popular for running system commands on Linux.

Synonyms

• CLI command: An instruction used in a Command-Line Interface.
• OS command: An operating system instruction.
• Terminal command: An instruction entered in a terminal emulator program.

Related Phrases

• Run a command: To execute or carry out a command.
  • You can run the command from this directory.
• Command syntax: The required structure and rules for formatting a command.
  • The command syntax for copying files is cp source destination.

Noun

1. a computer user's instruction (not part of a program) that calls for action by the computer's executive program