docker镜像改名/标签

ID=78938419

---

> docker images      
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
hexo-blog           v1                  df07f68d62fb        36 seconds ago      792MB
ubuntu              16.04               c6a43cd4801e        5 weeks ago         123MB
ubuntu              18.04               549b9b86cb8d        5 weeks ago         64.2MB
<none>              <none>              b6b7e4d1eb8e        6 weeks ago         1.93GB    # <----

docker image tag

> docker image tag b6b7e4d1eb8e pentest-tools:v1

REPOSITORY          TAG                 IMAGE ID            CREATED              SIZE
hexo-blog           v1                  df07f68d62fb        About a minute ago   792MB
ubuntu              16.04               c6a43cd4801e        5 weeks ago          123MB
ubuntu              18.04               549b9b86cb8d        5 weeks ago          64.2MB
pentest-tools       v1                  b6b7e4d1eb8e        6 weeks ago          1.93GB    # <----