installing docker

Post-installation steps for linux

• Create a docker group $ sudo groupadd docker

• Add your user to docker group $ sudo usermod -aG docker $USER

• Log again $ su - $USER

Testing docker

• Run hello-world application $ sudo docker run hello-world

• Docker version $ docker version

• Docker system's general information $ docker info

• Docker list of running containers $ docker ps

  • Status of running containers $ docker stats

• Docker list of all containers $ docker ps -a

Docker useful commands (run)

• Dettach terminal -d

• Forward port -p host_port:container_port

• Set workdir -w /path/to/app

Troubleshooting

• Check docker service status $ sudo service docker status or $ sudo journalctl -fu docker

• Check if docker container daemon is running $ ps -ax | grep docker

• Show docker images $ sudo docker images

• Inspecting an image $ sudo docker image inspect image_id

• a more extreme action can be $ sudo rm -rf /var/lib/docker

Starting, restarting and stopping docker

• Start $ sudo service docker start or systemctl start docker.service

• Restart $ sudo service docker restart

• Stop $ sudo service docker stop