# Maintenance

## Containers

Regularly check that containers whose services have either moved or been removed, are not still running

```bash
# List containers running.
docker compose ls
# Kill a container that should not still be running.
# The <id> is found in the list above.
docker kill <id>
```

## Space

### Pruning

> Docker takes a conservative approach to cleaning up unused objects (often referred to as "garbage collection"), such as images, containers, volumes, and networks. These objects **are generally not removed unless you explicitly ask Docker to do so**. This can cause Docker to use extra disk space. For each type of object, Docker provides a prune command. In addition, you can use docker system prune to clean up multiple types of objects at once.

- [Prune unused Docker objects  Docker Docs](https://docs.docker.com/engine/manage-resources/pruning/)