I installed docker and nvidia-docker to my workstation with my admin user account (sysadmin) but for some reason I cannot run nvidia-docker with this account while I can run nvidia-docker from my user account (zafer) without any problems. I get the following error: nvidia-docker | 2016/12/14 20:01:39 Error: Cannot connect to the Docker daemon. Is the docker daemon running on this host? Is there a way to add users to nvidia-docker's user group? I know how to do it for docker but I need the command for nvidia-docker. Thanks.