dockerd:tldr:11c8e

The dockerd command is used to start the Docker daemon, which runs on the host machine and listens for Docker API requests. The Docker daemon is responsible for managing Docker containers, images, networks, and volumes on the host system.

When you run the dockerd command, it initiates the Docker engine and makes the Docker API available to interact with. This allows you to use the Docker CLI (Command Line Interface) or any other Docker client to communicate with the Docker daemon and perform various Docker-related tasks.

The Docker daemon takes care of tasks like building Docker images from Dockerfiles, creating and managing Docker containers, downloading and managing Docker images from Docker registries, and networking and storage management for Docker.

The dockerd command is typically executed in the background as a system service or daemon, ensuring that Docker services are running continuously on the host machine.