Docker镜像无法删除

今天删除一个docker容器的image，报如下错误：# docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE 2ddf21d12069 28 minutes ago 400.8 MB ubuntu latest 063fbc9d9c89 5 weeks ago 639.8 MB centos latest de581ba9ee7f 5 weeks ago 474.6 MB # docker rmi 2ddf21d12069 Error response from daemon: Conflict, cannot delete 1ddf21d12069 because the container 81b3f82ccf18 is using it, use -f to force 2015/09/10 11:01:18 Error: failed to remove one or more images # docker rmi 81b3f82ccf18 Error response from daemon: No such image: 81b3f82ccf18 2015/09/10 11:01:49 Error: failed to remove one or more images