finding out tag for docker image code example
Example 1: how to change the tag of docker image
docker tag 7b9b13f7b9c0 ubuntu/dev:v1.6.14.2017
Example 2: check docker images
docker images [OPTIONS] [REPOSITORY[:TAG]]
docker tag 7b9b13f7b9c0 ubuntu/dev:v1.6.14.2017
docker images [OPTIONS] [REPOSITORY[:TAG]]