$ 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-837@tmp/554842e0-864e-444a-bbf6-b6d541c0fb6c/config.json. Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store Login Succeeded