Completely remove docker from your ubuntu server

save-ubuntu-from-docker.sh

# Sometimes you just need to "simple" remove docker from your server

sudo apt-get purge -y docker-engine docker docker.io docker-ce containerd.io
sudo apt-get autoremove -y --purge docker-engine docker docker.io docker-ce containerd.io
sudo umount /var/lib/docker/
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/bin/docker-compose
sudo ip link delete docker0
sudo rm -rf /opt/containerd
sudo iptables-save | grep -v -i docker | iptables-restore