Remove complete docker

docker-uninstall.sh

# identify what installed package you have
dpkg -l | grep -i docker

# remove for docker.io
sudo apt-get remove docker docker-engine docker.io
sudo apt-get purge -y docker.io
sudo apt-get autoremove -y --purge docker.io
sudo apt-get autoclean

sudo rm -rf /var/lib/docker
sudo rm /etc/apparmor.d/docker
sudo rm -rf /var/lib/docker
sudo rm -rf /etc/docker
sudo rm -rf /usr/bin/docker
sudo rm -rf /run/docker
sudo rm -rf /usr/lib/docker
sudo rm -rf /etc/init.d/docker
sudo rm -rf /etc/apparmor.d/cache/docker

sudo groupdel docker
sudo apt-get purge docker-ce