如何卸载docker

1.卸载

（1）yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-selinux \
                  docker-engine-selinux \
                  docker-engine

（2）rm -rf /etc/systemd/system/docker.service.d

（3）rm -rf /var/lib/docker

（4）rm -rf /var/run/docker