Docker – none 컨테이너 삭제하기

$ docker images -a
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
vpsdemop            latest              12473ad26899        2 minutes ago       1GB
<none>              <none>              84a6c05698e4        2 minutes ago       1GB
<none>              <none>              4011590a442e        3 minutes ago       1GB
<none>              <none>              fdf69123da65        3 minutes ago       1GB
...
<none>              <none>              b4a359727bd7        7 hours ago         112MB
ubuntu              20.04               1d622ef86b13        5 weeks ago         73.9MB
ubuntu              latest              1d622ef86b13        5 weeks ago         73.9MB
 
$ docker system prune
WARNING! This will remove:
        - all stopped containers
        - all networks not used by at least one container
        - all dangling images
        - all dangling build cache
Are you sure you want to continue? [y/N] y
Deleted Containers:
8df4735033ad6cedf4a3231368a99ab4e2121d717f6d025bf2773ff6c755e197
e923e2b8076739edbb33c6d5bb9864346d0ba6b7882df148bcc831f65cc9db98
...
deleted: sha256:97ee249f1d92e909be67962aaab947390273413854f6d710b0fb279e1917b36a
deleted: sha256:8b4f5330ef79a9b5b369a9168d45a49604d02761229edf60e1aa125cf4030530
 
Total reclaimed space: 5.38GB
 
$ docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
vpsdemop            latest              12473ad26899        3 minutes ago       1GB
ubuntu              20.04               1d622ef86b13        5 weeks ago         73.9MB
ubuntu              latest              1d622ef86b13        5 weeks ago         73.9MB