1、查看镜像 docker images

[root@localhost ~]# docker images
REPOSITORY                       TAG                 IMAGE ID            CREATED             SIZE
xuxueli/xxl-job-admin            2.3.0               24cc0d9dcf54        5 days ago          223MB
mysql                            latest              c8562eaf9d81        3 weeks ago         546MB
redis                            5                   e35748fd6a72        4 weeks ago         98.4MB
192.168.43.119:80/test/busybox   latest              754228d7562e        7 weeks ago         1.23MB
busybox_test                     1.0.0               754228d7562e        7 weeks ago         1.23MB
docker_test                      latest              754228d7562e        7 weeks ago         1.23MB

2、删除镜像，会报错

[root@localhost ~]# docker rmi 754228d7562e 754228d7562e 754228d7562e
Error response from daemon: conflict: unable to delete 754228d7562e (must be forced) - image is referenced in multiple repositories

仔细观察，发现754228d7562e这个镜像id指向了两个repository，因此无法删除

3、删除时可以用repository和tag的方式来删除

[root@localhost ~]# docker rmi 192.168.43.119:80/test/busybox:latestUntagged: 192.168.43.119:80/test/busybox:latest
Untagged: 192.168.43.119:80/test/busybox@sha256:5e8c842ceb8843c244a341f42bfb9ac701551d8ce6b23155be21ca2606de6bae

4、再次查看镜像，192.168.43.119:80/test/busybox:latest的就被删除了。

[root@localhost ~]# docker images
REPOSITORY              TAG                 IMAGE ID            CREATED             SIZE
xuxueli/xxl-job-admin   2.3.0               24cc0d9dcf54        5 days ago          223MB
mysql                   latest              c8562eaf9d81        3 weeks ago         546MB
redis                   5                   e35748fd6a72        4 weeks ago         98.4MB
docker_test             latest              754228d7562e        7 weeks ago         1.23MB
busybox_test            1.0.0               754228d7562e        7 weeks ago         1.23MB