1、先修改apt源为阿里源加速

备份原文件：

sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup

 修改源配置：

vim sources.list

 删除里面全部内容后，粘贴阿里源：

deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse

 更新源信息

sudo apt update
sudo apt upgrade

 2、Ubuntu安装Podman分两种情况，一种是Ubuntu版本高于20.10，则可以直接使用apt安装，命令如下：

apt install podman

3、低版本Ubuntu安装podman

3.1、先安装依赖

sudo apt install -y apt-transport-https ca-certificates curl software-properties-common

3.2、添加Podman仓库

curl -fsSL https://download.opensuse.org/repositories/devel:kubic:libcontainers:stable/xUbuntu_18.04/Release.key | sudo gpg --dearmor -o /usr/share/keyrings/libcontainers-archive-keyring.gpg
echo 'deb [signed-by=/usr/share/keyrings/libcontainers-archive-keyring.gpg] https://download.opensuse.org/repositories/devel:kubic:libcontainers:stable/xUbuntu_18.04/ /' | sudo tee /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list

3.3、 安装Podman

sudo apt update
sudo apt install podman

3.4、验证安装结果

podman --version

4、更名podman为docker，这样就能使用docker来代替podman执行

alias docker=podman

5、安装podman-compse

pip3 install https://github.com/containers/podman-compose/archive/main.tar.gz