while installing it i am getting this,
gaurav@LAPTOP-4KT5PNO7:~$ sudo service docker restart
- Starting Docker: docker [ OK ]
gaurav@LAPTOP-4KT5PNO7:~$ sudo 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'. can you help me?