这个是Debian 11的安装docker经过的代码，基本照抄运行就行。
sudo apt update
sudo apt upgrade
sudo apt install apt-transport-https ca-certificates curl gnupg lsb-release -y
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt update
sudo apt install docker-ce docker-ce-cli containerd.io -y
sudo systemctl is-active docker
sudo systemctl enable docker
完成
如果安装后，拉取项目时提示
Error response from daemon: error creating temporary lease: connection error: desc = "transport: Error while dialing: dial unix /run/containerd/containerd.sock: connect: connection refused": unavailable
这样报错，不妨重启一下VPS
至于一些其他的docker使用命令，以及GUI工具什么的，百度搜吧
或者这里瞅瞅：https://www.mfpud.com/topics/10886/
卸载docker的命令
sudo docker stop $(sudo docker ps -a -q)
sudo docker rm $(sudo docker ps -a -q)
sudo docker rmi $(sudo docker images -q)
sudo apt-get purge -y docker-ce docker-ce-cli containerd.io
sudo rm -rf /var/lib/docker /var/lib/containerd /etc/docker
sudo apt autoremove -y
一个简易的黑苹果安装教程：https://www.mfpud.com/topics/10263/
一个联系QQ：577535622
