Docker Engine is an open-source containerization software for building and containerizing your applications. Docker Engine acts as a client-server application with:
- A server with a long-running daemon process
- APIs which specify interfaces that programs can use to interact and instruct the Docker daemon.
- A command-line interface (CLI) client docker.
The CLI (command-line interface) uses Docker APIs to interact with the Docker daemon using either scripting or direct CLI commands. Many other Docker applications use the underlying API (application program interface) and CLI (command-line interface). The daemon creates and controls Docker objects – images, containers, networks, and volumes.
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Also, watch this video on Docker: