How to copy Docker images from one host to another without using a repository

Question

How do I transfer a Docker image from one machine to another one without using a repository, no matter private or public?

I create my own image in VirtualBox, and wh

Answer 1

I want to move all images with tags.

```
OUT=$(docker images --format '{{.Repository}}:{{.Tag}}')
OUTPUT=($OUT)
docker save $(echo "${OUTPUT[*]}") -o /dir/images.tar
``` 

Explanation:

First OUT gets all tags but separated with new lines. Second OUTPUT gets all tags in an array. Third $(echo "${OUTPUT[*]}") puts all tags for a single docker save command so that all images are in a single tar.

Additionally, this can be zipped using gzip. On target, run:

tar xvf images.tar.gz -O | docker load

-O option to tar puts contents on stdin which can be grabbed by docker load.