安裝docker
sudo apt-get install docker-ce docker-ce-cli containerd.io
卸載docker
apt-get purge卸載命令需要逐條執行
sudo apt-get purge docker-ce
sudo apt-get purge docker-ce-cli
sudo apt-get purge containerd.io
查看是否卸載完畢
apt list --installed | grep docker
apt list --installed | grep contain.io
刪除殘留文件
rm -rf /var/lib/docker
rm -rf /var/run/docker
rm -rf /etc/docker
rm -rf /run/docker.sock
rm -rf /var/lib/containerd
rm -rf /run/containerd
rm -rf /opt/containerd
參考：https://blog.csdn.net/weixin_43077628/article/details/114520707