Master DevOps Tools with Real Practice

# See how much space Docker is using
docker system df

# Basic prune: removes stopped containers, unused networks,
# dangling images, and dangling build cache
docker system prune

# Aggressive prune: also removes ALL unused images
# and volumes (use with caution)
docker system prune -a --volumes

# Prune with a time filter (remove items older than 24h)
docker system prune --filter "until=24h"

# Prune specific resource types
docker image prune -a      # unused images only
docker container prune      # stopped containers only
docker volume prune          # unused volumes only