Can I run the Docker Client without the Docker Daemon?

No. The CLI will simply throw an error saying 'Cannot connect to the Docker daemon'. The Client is just a remote control; without the TV (the Daemon), it does nothing.

Where are Docker Images stored on my computer?

They are stored deep within the Docker Daemon's system directory (usually `/var/lib/docker` on Linux). You should never interact with these raw files directly; always use the Docker CLI commands to manage them.

If an Image is read-only, how does a Container write to a database?

When a Container is started from an Image, Docker attaches a thin, invisible 'Read/Write layer' on top of the read-only Image. The application writes data to this top layer. However, when the Container is destroyed, this Read/Write layer is permanently deleted!

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Tutorials

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Docker Architecture

Dive into the internal architecture of the Docker Engine. Learn how the Docker Client communicates with the Docker Daemon, and deeply understand the critical distinction between immutable Images and running Containers.

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