Docker is a widely used containerization platform for building, running, and distributing applications, but as you develop and deploy containers over time, it accumulates unused objects like stopped containers, dangling images, unused volumes, and networks. These leftover resources consume disk space and can degrade system performance if not cleaned up. This guide explains how to use the docker prune command family to safely remove unused Docker resources, covering the differences between docker prune and manual deletion, how to use each prune variant, and how to avoid accidental data loss during cleanup. By the end, you'll have a repeatable set of commands for keeping your Docker host's disk usage under control.

What Is docker prune?

The docker prune command family removes unused Docker resources — stopped containers, dangling images, unused volumes, networks, and build cache — all in one go.…