E: Some index files failed to download. They have been**

问题描述：

当使用Dockerfile从包含cuda的镜像建立新的image的时候，显示以下bug：

Step 7/8 : RUN apt-get update && DEBIAN_FRONTEND="noninteractive" apt-get install -y -q     libcudnn6=$CUDNN_VERSION-1+cuda8.0     libcudnn6-dev=$CUDNN_VERSION-1+cuda8.0  && rm -rf /var/lib/apt/lists/*
 ---> Running in 94b890e74e5a
Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]
Ign:2 http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64  InRelease
Get:3 http://archive.ubuntu.com/ubuntu xenial InRelease [247 kB]
Ign:4 http://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1604/x86_64  InRelease
Get:5 http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64  Release [564 B]
Get:6 http://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1604/x86_64  Release [564 B]
Get:7 http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64  Release.gpg [801 B]
Get:8 http://security.ubuntu.com/ubuntu xenial-security/universe Sources [73.2 kB]
Get:9 http://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1604/x86_64  Release.gpg [801 B]
Get:10 http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64  Packages [98.4 kB]
Get:11 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages [589 kB]
Get:12 http://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1604/x86_64  Packages [17.9 kB]
Err:12 http://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1604/x86_64  Packages
  Hash Sum mismatch
Get:13 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB]

Get:14 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB]

Get:15 http://archive.ubuntu.com/ubuntu xenial/universe Sources [9,802 kB]
Get:16 http://security.ubuntu.com/ubuntu xenial-security/restricted amd64 Packages [12.7 kB]
Get:17 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 Packages [406 kB]
Get:18 http://security.ubuntu.com/ubuntu xenial-security/multiverse amd64 Packages [3,486 B]

Get:19 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages [1,558 kB]
Get:20 http://archive.ubuntu.com/ubuntu xenial/restricted amd64 Packages [14.1 kB]

Get:21 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages [9,827 kB]

Get:22 http://archive.ubuntu.com/ubuntu xenial/multiverse amd64 Packages [176 kB]
Get:23 http://archive.ubuntu.com/ubuntu xenial-updates/universe Sources [242 kB]
Get:24 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [957 kB]
Get:25 http://archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 Packages [13.1 kB]
Get:26 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [766 kB]
Get:27 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 Packages [18.5 kB]
Get:28 http://archive.ubuntu.com/ubuntu xenial-backports/main amd64 Packages [5,153 B]
Get:29 http://archive.ubuntu.com/ubuntu xenial-backports/universe amd64 Packages [7,705 B]
Fetched 25.1 MB in 9s (2,576 kB/s)

Reading package lists...
E: Failed to fetch http://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1604/x86_64/Packages.gz  Hash Sum mismatch
E: Some index files failed to download. They have been ignored, or old ones used instead.

解决方案

在Dockerfile 运行这行代码

 RUN apt-get -qq -y update && \
    DEBIAN_FRONTEND=noninteractive apt-get -qq -y install \
    gcc \
    ... \

之前加入以下代码

 RUN rm /etc/apt/sources.list.d/cuda.list && rm /etc/apt/sources.list.d/nvidia-ml.list

成功解决！