Which command would you use to stop a running Docker container?

The command used to stop a running Docker container is "docker stop [container_id]." This command sends a SIGTERM signal to the main process inside the container, allowing it to gracefully shut down. If the process does not stop within a default timeout period (which is 10 seconds), Docker will then send a SIGKILL signal to forcibly stop the process.

This command is essential as it ensures that the application running inside the container can perform any necessary cleanup before terminating. It’s a preferred method for stopping containers as it helps to maintain data integrity and state consistency.

The other commands listed do not exist in the Docker command line interface. "docker halt," "docker end," and "docker shutdown" are not valid options for stopping a Docker container. Familiarity with the correct command is crucial for effective container management.