1.在在线的Ubuntu20.04上从Index of linux/ubuntu/dists/focal/pool/stable/arm64/
下载这个3个文件：
containerd.io_1.6.9-1_arm64.deb
docker-ce-cli_23.0.0-1~ubuntu.20.04~focal_arm64.deb
docker-ce_23.0.0-1~ubuntu.20.04~focal_arm64.deb
然后执行sudo dpkg -i *.deb 安装docker
2. 从在线的Ubuntu20.04上下载离线包
先确定下载源：
distribution=$(. /etc/os-release;echo $ID$VERSION_ID)
curl -s -L https://nvidia.github.io/nvidia-docker/gpgkey | sudo apt-key add -
curl -s -L https://nvidia.github.io/nvidia-docker/$distribution/nvidia-docker.list | sudo tee /etc/apt/sources.list.d/nvidia-docker.list
sudo apt-get update
再下载以下包：
libnvidia-container0_0.11.0+jetpack_arm64.deb
libnvidia-container1_1.13.5-1_arm64.deb
libnvidia-container-tools_1.13.5-1_arm64.deb
nvidia-container-toolkit-base_1.13.5-1_arm64.deb
nvidia-container-toolkit_1.13.5-1_arm64.deb
nvidia-container-runtime_3.13.0-1_all.deb
nvidia-docker2_2.13.0-1_all.deb
3.在离线的Ubuntu20.04上依次安装这些包：
sudo dpkg -i libnvidia-container0_0.11.0+jetpack_arm64.deb
sudo dpkg -i libnvidia-container1_1.13.5-1_arm64.deb
sudo dpkg -i libnvidia-container-tools_1.13.5-1_arm64.deb
sudo dpkg -i nvidia-container-toolkit-base_1.13.5-1_arm64.deb
sudo dpkg -i nvidia-container-toolkit_1.13.5-1_arm64.deb
sudo dpkg -i nvidia-container-runtime_3.13.0-1_all.deb
sudo dpkg -i nvidia-docker2_2.13.0-1_all.deb