apt-get update 시 nvidia 의 GPG error 해결 방법

30 Jun 2022

문제 증상

apt-get update 명령어를 던질 때마다 GPG error 가 나타난다.

$ sudo apt-get update
Get:1 https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64  InRelease [1581 B]
Hit:2 https://cloud.r-project.org/bin/linux/ubuntu bionic-cran35/ InRelease
Hit:3 https://packages.cloud.google.com/apt cloud-sdk InRelease
Err:1 https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64  InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A4B469963BF863CC
Hit:4 http://archive.ubuntu.com/ubuntu bionic InRelease
Hit:5 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu bionic InRelease
Ign:6 https://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1804/x86_64  InRelease
Hit:7 https://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1804/x86_64  Release
Hit:8 http://security.ubuntu.com/ubuntu bionic-security InRelease
Hit:9 http://archive.ubuntu.com/ubuntu bionic-updates InRelease
Hit:10 http://archive.ubuntu.com/ubuntu bionic-backports InRelease
Hit:11 http://ppa.launchpad.net/openjdk-r/ppa/ubuntu bionic InRelease
Reading package lists... Done
W: GPG error: https://developer.download.nvidia.com/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.

해결 방법

NVIDIA 측에서 pubkey 를 바꾸는 중이라 수동으로 직접 바꾸어 주어야 한다.

$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys A4B469963BF863CC