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What does "Docker daemon" mean in programming?

Docker daemon is one of the most common terms in software development. This guide explains what it means, how it is used in practice, and why it matters, with real examples from the developer world.

Definition

The background service (`dockerd`) that manages Docker objects such as images, containers, networks, and volumes. The Docker CLI communicates with the daemon via a REST API to carry out commands.

Example

"The Docker daemon must be running before you can execute any docker commands."

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