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Beginner

Docker CLI

Definition

The Command Line Interface. The primary tool that human users use to interact with Docker by typing commands in the terminal.

Explain Like I'm New

The steering wheel and pedals. The CLI takes your typed text (`docker run ubuntu`) and translates it into an API request that the Docker Engine understands.

Real World Example

Opening Terminal or Command Prompt and typing `docker ps` to see a list of running containers. That text is processed by the Docker CLI.

Common Use Cases

  • •Daily developer workflows
  • •CI/CD scripting

Interview Questions

basic

  • If you type `docker version`, which component are you directly interacting with?

intermediate

  • Can the Docker CLI on your laptop be configured to control a Docker Engine running on a completely different server?

Flash Cards

Question

Which component?

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Answer

The Docker CLI.

Question

Control remote server?

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Answer

Yes. You can point the CLI to a remote Docker host by setting the `DOCKER_HOST` environment variable, allowing you to manage a remote server as if it were running locally.