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Question 5 of 45

How do you create a Docker container from an image?

beginner
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Re-explain

Use docker run, which creates a container from an image and starts it in one step. If the image isn't on the host yet, Docker first pulls it from the registry.

docker run does the work of two commands. docker create makes the container by adding a writable layer on top of the image, and docker start runs its main process. Docker also connects the container to the default network unless you choose another one.

The flags below name the container, publish a port, and run it detached or interactively.

# Basic container creation
docker run nginx
# Run with custom name and port mapping
docker run --name my-nginx -p 8080:80 nginx
# Run in background (detached mode)
docker run -d --name web-server nginx
# Run interactively
docker run -it ubuntu bash

When the main process exits, the container stops but isn't removed, so you can start it again later.

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