[root@localhost ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
pujh/centos tomcat-centos 70ff7873d7cd About an hour ago MB
docker.io/centos latest 9f38484d220f days ago MB
[root@localhost ~]# docker tag 70ff7873d7cd my_centos:tomcat-centos
[root@localhost ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
my_centos tomcat-centos 70ff7873d7cd About an hour ago 612 MB
pujh/centos tomcat-centos 70ff7873d7cd About an hour ago MB
docker.io/centos latest 9f38484d220f days ago MB [root@localhost ~]# docker rmi 70ff7873d7cd
Error response from daemon: conflict: unable to delete 70ff7873d7cd (cannot be forced) - image is being used by running container 70859e710147
[root@localhost ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
70859e710147 70ff "/bin/sh -c '/root..." About an hour ago Up About an hour 0.0.0.0:->/tcp dazzling_hopper
[root@localhost ~]# docker stop 70859e710147
[root@localhost ~]# docker rm 70859e710147
[root@localhost ~]# docker rmi 70ff7873d7cd
[root@localhost ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
my_centos tomcat-centos 70ff7873d7cd About an hour ago 612 MB
docker.io/centos latest 9f38484d220f 11 days ago 202 MB