What command would you use to list all running containers?

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The command utilized to list all running containers in Docker is indeed "docker ps -a." This command provides a comprehensive overview of all containers, including those that are currently running as well as those that have been stopped or exited.

In this command, "ps" stands for "process status," a term borrowed from Unix/Linux command syntax, and the "-a" flag is used to indicate that containers in all states should be listed, rather than just the ones that are running at the moment. This is helpful for management, as it allows users to monitor both active and inactive containers.

For context regarding the other choices, "docker list" is not a valid command in Docker, as listing containers is done through the "ps" command. Similarly, "docker running" does not exist as a command in the Docker CLI. Lastly, "docker ls" is not a recognized command for managing containers; it is often recognized in similar contexts (like "docker volume ls" or "docker network ls") but does not apply to containers directly.

Using "docker ps -a" ensures that you have the full picture of all container states, which is vital for effective container management in a Docker environment.

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