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 报错 ：   

E: Failed to fetch https://developer.download.nvidia.cn/compute/cuda/repos/ubuntu2004/x86_64/by-hash/SHA256/60afcf24526893b1713a7ce2d773cabe942d80dd637ba44327e34e890118a730  404  Not Found [IP: 180.97.232.92 443]E: Some index files failed to download. They have been ignored, or old ones used instead.

Err:11 https://developer.download.nvidia.cn/compute/cuda/repos/ubuntu2004/x86_64  Packages

在如下网页中找到：

解决方法，执行

rm /etc/apt/sources.list.d/cuda.list

FROM nvidia/cuda:8.0-cudnn6-devel-ubuntu16.04RUN rm /etc/apt/sources.list.d/cuda.list

执行命令后 显示：

root@077dbe967071:/home/l1# apt-key adv --fetch-keys http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64/7fa2af80.pubExecuting: /tmp/apt-key-gpghome.v9PegdjuZh/gpg.1.sh --fetch-keys http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64/7fa2af80.pubgpg: requesting key from 'http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64/7fa2af80.pub'gpg: key F60F4B3D7FA2AF80: "cudatools 
   
    " not changedgpg: Total number processed: 1gpg:              unchanged: 1
   

执行后  apt-get update   可以执行：

root@077dbe967071:/home/l1# apt-get updateHit:1 https://mirrors.tuna.tsinghua.edu.cn/ubuntu bionic InReleaseHit:2 https://mirrors.tuna.tsinghua.edu.cn/ubuntu bionic-updates InReleaseHit:3 https://mirrors.tuna.tsinghua.edu.cn/ubuntu bionic-backports InReleaseHit:4 https://mirrors.tuna.tsinghua.edu.cn/ubuntu bionic-security InReleaseHit:5 https://nvidia.github.io/libnvidia-container/ubuntu16.04/amd64  InReleaseHit:6 https://nvidia.github.io/nvidia-container-runtime/ubuntu16.04/amd64  InReleaseHit:7 https://nvidia.github.io/nvidia-docker/ubuntu16.04/amd64  InReleaseReading package lists... Doneroot@077dbe967071:/home/l1#

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