$ 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-ce-packaging_PR-809@tmp/2f9f141a-e6e6-4c2b-87e9-cd8b84e71dc0/config.json. Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store Login Succeeded