SECAI Core · phase 12 of 15 · noun

Command-line interface

A text-based interface between the user and the operating system that accepts input in the form of commands.

The Explain card

Plain English
A CLI is a text-based way to talk to a computer. You type a command, the system runs it and prints the result, with no buttons or windows involved.
Example
A security engineer runs a model-scanning tool from the terminal to check a downloaded model file for unsafe serialised code before loading it, then pipes the output into a report script.
Why it matters
Most AI tooling, from training scripts to agent frameworks, is driven from the command line. When an AI agent is given shell access, every command it can type is a capability an attacker may try to borrow.
Hook
No clicks, just commands: powerful, scriptable, and dangerous in the wrong hands.

Word knowledge

How the word is built, where it came from, and what it sits beside in memory.

In a sentence

An analyst uses a command-line interface to run a malware scanner against a downloaded model file.

Why these words
  • command Latin commandare, to entrust or order, through Old French comander identifies the instruction supplied by the user
  • line Latin linea, linen thread or line refers to the row in which an instruction is entered
  • interface English compound of inter- and face names the point of interaction
Where it came from
Origin
English computing compound formed from command line and interface
Entered the language
1970s
What changed
Command broadened from an authoritative order to a machine instruction, while line came to mean a row of entered text.
How it is spelled
Pattern
Command-line is hyphenated because the two words act together as a modifier before interface.
Pattern
Interface is written as one word, following the closed-compound pattern of inter- formations.

Spelled like

  • text-based interface
  • menu-driven interface
  • command-line tool
  • command-line option
Broken into chunks
  • command
    • commander
    • commandment
  • line
    • linear
    • lineage
  • inter
    • interaction
    • interconnect
  • face
    • facial
    • surface
What it sits beside

Same subject

  • shell
  • terminal emulator
  • command prompt
  • command injection

Same shape

  • command-line argument
  • command-line option
  • command-line tool

user interfaces

  • command-line interface
  • graphical user interface
  • menu-driven interface

command components

  • command
  • option
  • argument

Where it sits in the deck

Phase 12: Defensive Technologies and Secure Development Practices

Map defences directly to the attacks just catalogued — the technical controls, secure coding practices, and protective tools that harden AI and traditional systems alike.

Neighbours in this phase