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Command-Line Interface (CLI)

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descriptionCommand-line interface used to interact with software through typed commands in a terminal.
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A CLI is a command-line interface used to interact with software through typed commands in a terminal.

Instead of clicking through graphical menus, a CLI lets the user run commands, pass options and arguments, and script workflows directly from text input.

What it does​

A CLI gives software a text-based interface.

It is commonly used to:

  • Run commands and subcommands
  • Pass flags, options, and arguments
  • Automate workflows with scripts
  • Manage local and remote systems
  • Interact with developer tools, APIs, and infrastructure

Core concepts​

Text-based interface​

A CLI is an interface style, not a specific app.

Many tools expose a CLI so users can operate them from a shell instead of a graphical interface.

Terminal and shell workflow​

A CLI is usually used inside a terminal and interpreted through a shell.

That is why CLI usage is closely tied to terminal environments rather than standalone windows or dashboards.

Automation-friendly​

One of the main strengths of a CLI is that commands can be repeated, scripted, and combined.

That makes CLIs especially useful in developer, ops, and admin workflows.

Common use cases​

  • Running developer tools
  • Managing files and processes
  • Automating setup and deployment
  • Working with Git, cloud platforms, and package managers
  • Administering systems and servers

Practical notes​

  • A CLI is different from the terminal application used to access it.
  • Some tools offer both a CLI and a GUI.
  • Good CLIs are composable, scriptable, and consistent in how they expose commands and help output.
  • CLI workflows are central to development, automation, and infrastructure work.

Sources Used​

Frequently Asked Questions​

Is CLI the same as terminal?​

No. The CLI is the interface style or command-driven tool. The terminal is the environment used to interact with it.

Is CLI only for developers?​

No. It is heavily used by developers, but also by sysadmins, power users, and automation workflows.

Is Bash a CLI?​

Not exactly. Bash is a shell that is commonly used to run CLI tools.