安装：

https://www.runoob.com/docker/ubuntu-docker-install.html

sudo apt-get remove docker docker-engine docker.io containerd runcsudo apt-get install \apt-transport-https \ca-certificates \curl \gnupg-agent \software-properties-commoncurl -fsSL https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.ascecho \"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu/ \$(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get updatesudo apt-get install docker-ce docker-ce-cli containerd.ioapt-cache madison docker-cesudo apt-get install docker-ce=VERSION_STRING docker-ce-cli=VERSION_STRING containerd.iosudo docker run hello-world

换源：
注意，因为初始的域名不可访问，所有代理没有效果，只能换源!

{"builder": {"gc": {"defaultKeepStorage": "20GB","enabled": true}},"experimental": false,"registry-mirrors": ["https://docker.hpcloud.cloud","https://docker.m.daocloud.io","https://docker.unsee.tech","https://docker.1panel.live","http://mirrors.ustc.edu.cn","https://docker.chenby.cn","http://mirror.azure.cn","https://dockerpull.org","https://dockerhub.icu","https://hub.rat.dev"]
}