To completely uninstall Docker:
Step 1
''' dpkg -l | grep -i docker '''
To identify what installed package you have:
Step 2
''' sudo apt-get purge -y docker-engine docker docker.io docker-ce docker-ce-cli docker-compose-plugin sudo apt-get autoremove -y --purge docker-engine docker docker.io docker-ce docker-compose-plugin '''
The above commands will not remove images, containers, volumes, or user created configuration files on your host. If you wish to delete all images, containers, and volumes run the following commands:
sudo rm -rf /var/lib/docker /etc/docker sudo rm /etc/apparmor.d/docker sudo groupdel docker sudo rm -rf /var/run/docker.sock sudo rm -rf /usr/local/bin/docker-compose sudo rm -rf /etc/docker You have removed Docker from the system completely.