$ sudo apt-get remove docker docker-engine docker.io containerd runc

# 更新资源库
$ sudo apt-get update
# 安装证书
$ sudo apt-get install \
    ca-certificates \
    curl \
    gnupg \
    lsb-release
# 安装官方GPG key
$ sudo mkdir -p /etc/apt/keyrings
################  这段可以替换为国内阿里云镜像地址 开始
### 将2块 `https://download.docker.com/linux/ubuntu` 替换为 `https://mirrors.aliyun.com/docker-ce/linux/ubuntu`
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
# 建立docker资源库
$ echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
################### 这段可以替换为国内阿里云镜像地址 结束
# 再次更新资源库
$ sudo apt-get update
# 开始安装
$ sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin
# 验证 是否安装成功
$ sudo docker -v
Docker version 20.10.17, build 100c701
$ docker run hello-world
docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post "http://%2Fvar%2Frun%2Fdocker.sock/v1.24/containers/create": dial unix /var/run/docker.sock: connect: permission denied.
See 'docker run --help'.
# 增加当前用户入docker组中
$ sudo groupadd docker
groupadd: group 'docker' already exists
$ sudo gpasswd -a $USER docker
Adding user tester to group docker
$ newgrp docker
# 再次验证
$ docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
$ docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
2db29710123e: Pull complete

sudo -i 
curl -L https://get.daocloud.io/docker/compose/releases/download/v2.6.1/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose