diff --git a/tools/docker.sh b/tools/docker.sh
index 3b87fca..9c9b385 100644
--- a/tools/docker.sh
+++ b/tools/docker.sh
@@ -20,6 +20,8 @@ docker login                                # Log in this CLI session using your
 docker tag <image> username/repository:tag  # Tag <image> for upload to registry
 docker push username/repository:tag         # Upload tagged image to registry
 docker run username/repository:tag          # Run image from a registry
+docker system prune                         # Remove all unused containers, networks, images (both dangling and unreferenced), and optionally, volumes. (Docker 17.06.1-ce and superior)
+docker system prune -a                      # Remove all unused containers, networks, images not just dangling ones (Docker 17.06.1-ce and superior)
 
 
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