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Why can’t I push images to Docker Hub after logging in?

Article ID: KB000527

After logging in, if you receive the following error when trying to push images to Docker Hub, you have some issues with the authentication payload:

unauthorized: authentication required

Perform a simple check on the ~/.docker/config.json file and ensure that the endpoint is correct. The correct configuration should look something like this:

{
   "auths": {
           "https://index.docker.io/v1/</^^>": {
                   "auth": "Y2hlcnlscTI2OkNoZXJRMjYqKg==",
                   "email": "example@example.com"
           }
   }}

Take note that the authentication endpoint should be [https://index.docker.io/v1/](https://index.docker.io/v1/ "https://index.docker.io/v1/"). The remaining payload (**auth** and **email**) will vary from user to user.

In addition, please ensure that you are pushing the images with the following syntax:

docker push <namespace>/<image>:<tag>

For example:

docker push mydockerid/hello-world:latest

Note: This issue commonly arises when you are using Docker Engines that are not from https://docs.docker.com/engine/installation/.