docker system

> docker system

Usage:  docker system COMMAND

Manage Docker

Commands:
  df          Show docker disk usage
  events      Get real time events from the server
  info        Display system-wide information
  prune       Remove unused data

> docker system df
TYPE            TOTAL     ACTIVE    SIZE      RECLAIMABLE
Images          71        30        22.85GB   9.74GB (42%)
Containers      91        37        95.68GB   95.68GB (99%)
Local Volumes   14        8         908.4MB   0B (0%)
Build Cache     105       0         987.7MB   987.7MB