Image dump
$ docker save -o dump_file_name.tar IMAGE
$ docker save IMAGE | gzip > dump_file_name.tgz
$ docker load -i dump_file_name.tar
$ gunzip -c dump_file_name.tgz | docker load
Container dump
$ docker export CONTAINER_NAME|CONTAINER_ID > dump_file_name.tar
$ docker import dump_file_name.tar