What command is used to run a Docker container?

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The command used to run a Docker container is "docker run." This command not only creates a new container from an image but also starts it immediately. When you use "docker run," you have the ability to specify various options such as environment variables, port mappings, and volume mounts, allowing for a versatile setup of the container's runtime environment.

In contrast, some of the other commands have different functionalities. "docker start" is used primarily to start an already created and stopped container; it does not create a new container but resumes one that is already defined. "docker create" is utilized to create a container from an image but does not initiate it—that's why a separate step is required to start the container after it's created. "docker exec" is designed to execute a command in a running container, which means it can be used to run additional processes inside an already active container, but it does not run a container from scratch.

Thus, "docker run" is the comprehensive command that accomplishes the dual task of creating and running a container, making it the correct choice for the question.

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