【docker-gpu】报错：W: GPG error:xxx, InRelease: The following signatures couldn‘t be verified because th
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报错内容：
W: GPG error: https://developer.download.nvidia.cn/compute/cuda/repos/ubuntu1804/x86_64 InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A4B469963BF863CC
E: The repository 'https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64 InRelease' is no longer signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
解决GPG 错误由于没有公钥，无法验证下列签名
解决方法：
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys A4B469963BF863CC
–recv-keys后面输入自己报错中的NO_PUBKEY的值
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