Docker save command
docker save: save the specified image into a tar archive.
grammar
docker save [OPTIONS] IMAGE [IMAGE...]
OPTIONS Description:
-o: output to a file.
Examples
Mirrored w3big / ubuntu: v3 documentation generated my_ubuntu_v3.tar
w3big@w3big:~$ docker save -o my_ubuntu_v3.tar w3big/ubuntu:v3 w3big@w3big:~$ ll my_ubuntu_v3.tar -rw------- 1 w3big w3big 142102016 Jul 11 01:37 my_ubuntu_v3.ta