$ docker login

<enter user name and password for Docker Hub Repository>

​

$ docker tag first-image {docker-hub-username}/{default-repo-folder-name}:first-image

​

$ docker push {docker-hub-username}/{default-repo-folder-name}:first-image

# login into the docker hub and then try to push the image

docker login

docker tag image_name YOUR_DOCKERHUB_NAME/image_name

docker push YOUR_DOCKERHUB_NAME/image_name:latest

docker tag firstimage YOUR_DOCKERHUB_NAME/firstimage

docker push YOUR_DOCKERHUB_NAME/firstimage