$ docker login -u dockerbuildbot -p ******** https://index.docker.io/v1/ WARNING! Using --password via the CLI is insecure. Use --password-stdin. WARNING! Your password will be stored unencrypted in /home/ubuntu/workspace/docker-py_PR-3023@tmp/d2a67732-a1ab-4c8e-b8cd-c96c0dac7f4b/config.json. Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store Login Succeeded