I am very new to the docker when try to run docker info it gives me following error.
$ docker info FATA[0000] Get http:///var/run/docker.sock/v1.17/info: dia
I had the same problem. I needed add my user to docker group (on /etc/group or uses sudo gpasswd -a user docker - and restarting the session.
sudo gpasswd -a user docker
OS: Ubuntu 14.04.2 LTS 3.13.0-57-generic x64