What does the `docker prune` command do?

What does the `docker prune` command do?

• A. Creates a backup of Docker configurations
• B. Removes unused data from Docker
• C. Updates Docker to the latest version
• D. Starts all stopped containers

Answer: (B)

The `docker prune` command is designed to remove unused data from Docker, which helps in reclaiming disk space and maintaining a cleaner working environment. It specifically targets items like stopped containers, unused networks, dangling images, and build cache that are no longer needed. By invoking this command, users can effectively clean up their Docker environment, ensuring that only necessary resources are retained. This functionality is crucial for managing disk usage, especially in setups where multiple containers and images are frequently created and destroyed. The ability to remove unused data helps streamline operations and ensures that the Docker environment remains efficient over time.

The docker prune command is designed to remove unused data from Docker, which helps in reclaiming disk space and maintaining a cleaner working environment. It specifically targets items like stopped containers, unused networks, dangling images, and build cache that are no longer needed. By invoking this command, users can effectively clean up their Docker environment, ensuring that only necessary resources are retained.

This functionality is crucial for managing disk usage, especially in setups where multiple containers and images are frequently created and destroyed. The ability to remove unused data helps streamline operations and ensures that the Docker environment remains efficient over time.