How to free wasted space used by docker?

docker build diskspace

In the latest versions of Docker, you can now use docker system prune command (with --all option for complete cleanup).

docker build diskspace

In order to remove volumes use:

docker volume prune

In order to remove networks use:

docker network prune

In order to remove all stopped containers use:

docker container prune

In order to remove unused images use:

docker image prune

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