WSL Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

https://stackoverflow.com/questions/61592709/docker-not-running-on-ubuntu-wsl-due-to-error-cannot-connect-to-the-docker-daemo

 

In WSL,

sudo -s -H

 

# docker ps
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

 

# docker run hello-world
docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.
See 'docker run --help'.

 

Solution: 

$ sudo /etc/init.d/docker start
* Starting Docker: docker [ OK ]