What does the docker history command show?

The docker history command is specifically designed to provide an overview of the history of a particular Docker image. It details the various layers that make up the image, including the commands that were executed to create each layer. This information includes timestamps, sizes, and the actual commands used in the Dockerfile to build the image.

Understanding the output of the docker history command is important for developers and system administrators because it gives insights into how an image was built, allows for tracking changes made over time, and helps in debugging issues related to image construction. This historical context can be essential for maintaining, updating, or optimizing Docker images effectively.

The other options refer to different aspects of Docker functionality. For instance, listing all running containers pertains to real-time management rather than the historical aspect of image creation, while the status of the Docker daemon focuses on its operational state, and a summary of Docker configurations pertains to the settings and configurations rather than image history.