docker: Error response from daemon: could not select device driver “” with capabilities: [[gpu]].

然后按照网上的博客进行以下操作

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 && sudo apt-get install -y nvidia-container-toolkit
sudo systemctl restart docker

没有效果，并且会报两个错误：
1.无效的open GPG
2.无法定位到nvidia-container-toolkit

做了以下修改后，可以完成：

1，先下载gpgkey文件
https://nvidia.github.io/nvidia-docker/ 找到自己对应的系统，我的是ubuntu.

2.执行
curl -s -L https://nvidia.github.io/nvidia-docker/gpgkey | \
将得到的gpgkey写入文件中，如gpgkey,然后添加：

sudo apt-key add gpgkey

3.下面链接的$distribution替换成操作系统版本，我的是ubuntu20.04系统，https://nvidia.github.io/nvidia-docker/$distribution/nvidia-docker.list

内容如下：

deb https://nvidia.github.io/libnvidia-container/stable/ubuntu18.04/$(ARCH) /
#deb https://nvidia.github.io/libnvidia-container/experimental/ubuntu18.04/$(ARCH) /
deb https://nvidia.github.io/nvidia-container-runtime/stable/ubuntu18.04/$(ARCH) /
#deb https://nvidia.github.io/nvidia-container-runtime/experimental/ubuntu18.04/$(ARCH) /
deb https://nvidia.github.io/nvidia-docker/ubuntu18.04/$(ARCH) /

4.将网页中的内容拷贝到/etc/apt/sources.list.d/nvidia-docker.list中

5.执行以下指令，即可

sudo apt-get update && sudo apt-get install -y nvidia-container-toolkit
sudo systemctl restart docker