xxxxxxxxxx
sudo /etc/init.d/docker start
systemctl start docker.service
#(OR)
systemctl start docker
# it will start docker
$ docker start my_container
xxxxxxxxxx
systemctl start docker.service
#(OR)
systemctl start docker
# it will start docker
xxxxxxxxxx
sudo systemctl list-units --type=service
sudo systemctl start snap.docker.dockerd.service
sudo systemctl restart snap.docker.dockerd.service
sudo systemctl status snap.docker.dockerd.service