系统环境

ubuntu20.0.4

卸载旧版docker

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

设置docker资源库

1 更新资源库和必要软件

sudo apt-get update
sudo apt-get install     apt-transport-https     ca-certificates     curl     gnupg     lsb-release

2 添加Docker的官方GPG密钥

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

3 设置稳定的存储库

echo   "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu   $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

安装docker

sudo apt-get update
 sudo apt-get install docker-ce docker-ce-cli containerd.io

测试

sudo docker run hello-world

安装docker