Can't connect to docker from docker-compose

Question

I installed docker-machine 0.1.0 and docker-compose 1.1.0 on Mac OS 10.8.5.
Docker-machine is running normally and able to connect by docker-machine ssh.

Answer 1

I solved the issue in Ubuntu 20.0.4 by

sudo chmod 666 /var/run/docker.sock

and then

sudo service docker start && docker-compose up -d

Ref.