GPG error: "public key is not available" in Ubuntu

For both server and container:

Official solution

https://developer.nvidia.com/blog/updating-the-cuda-linux-gpg-repository-key/

Remove the outdated signing key

Debian, Ubuntu, WSL

$ sudo apt-key del 7fa2af80

Install the new key

For Debian-based distributions, including Ubuntu, you must also install the new package or manually install the new signing key.

Install the new cuda-keyring package

To avoid the need for manual key installation steps, NVIDIA is providing a new helper package to automate the installation of new signing keys for NVIDIA repositories. 

Replace $distro/$arch in the following commands with values appropriate for your OS; for example:

• ubuntu1604/x86_64
• ubuntu1804/cross-linux-sbsa
• ubuntu1804/ppc64el
• ubuntu1804/sbsa
• ubuntu1804/x86_64
• ubuntu2004/cross-linux-sbsa
• ubuntu2004/sbsa
• ubuntu2004/x86_64
• ubuntu2204/sbsa
• ubuntu2204/x86_64
• wsl-ubuntu/x86_64

Debian, Ubuntu, WSL

$ wget https://developer.download.nvidia.com/compute/cuda/repos/$distro/$arch/cuda-keyring_1.0-1_all.deb
$ sudo dpkg -i cuda-keyring_1.0-1_all.deb

Common issues and solutions on Debian-based distros

Here are some common errors that we’ve helped people with. If you see an error not listed here, please comment below.

Duplicate .list entries

{{E: Conflicting values set for option Signed-By regarding source
https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/ /: 
/usr/share/keyrings/cuda-archive-keyring.gpg !=
E: The list of sources could not be read.}}

Solution: If you previously used add-apt-repository to enable the CUDA repository, then remove the duplicate entry.

sudo sed -i '/developer\.download\.nvidia\.com\/compute\/cuda\/repos/d' /etc/apt/sources.list

Also check for and remove cuda*.list files under the /etc/apt/sources.d/ directory.

----------------------------------------------

Error

Err:6 http://packages.microsoft.com/repos/azurecore focal InRelease

  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EB3E94ADBE1229CF

Reading package lists... Done

W: GPG error: http://packages.microsoft.com/repos/azurecore focal InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EB3E94ADBE1229CF

Solution

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys
EB3E94ADBE1229CF

# 

Problem in docker

RUN sudo apt-key adv --fetch-keys https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64/3bf863cc.pub

or 

RUN wget https://developer.download.nvidia.com/compute/cuda/repos/$distro/$arch/cuda-keyring_1.0-1_all.deb

RUN sudo dpkg -i cuda-keyring_1.0-1_all.deb

Update 2023-0705

Error:

gpgkeys: key F60F4B3D7FA2AF80 not found on keyserver

https://askubuntu.com/questions/831386/gpgkeys-key-f60f4b3d7fa2af80-not-found-on-keyserver

The solution is:

wget -qO - https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/7fa2af80.pub | sudo apt-key add -

as documented here: https://developer.nvidia.com/cuda-downloads -> Linux -> x86_64 -> Ubuntu -> 18.04 -> deb (network)

Conflict key error for "sudo apt update", can not find in source

E: Conflicting values set for option Signed-By regarding source https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/ /: /usr/share/keyrings/cuda-archive-keyring.gpg !=




Solution 1:
remove /etc/apt/source.list.d/cuda*, /etc/apt/source.list.d/nccl*
del cuda_key

Solution 2:

sed -i '/developer\.download\.nvidia\.com\/compute\/cuda\/repos/d' /etc/apt/sources.list.d/*
sed -i '/developer\.download\.nvidia\.com\/compute\/machine-learning\/repos/d' /etc/apt/sources.list.d/*

from:

https://askubuntu.com/questions/1424040/e-conflicting-values-set-for-option-signed-by-regarding-source-https-develope/1424054#1424054

git submodule

 

Already in git repo

git submodule update --init --recursive.

Update remotely

Since git 1.8 you can do

git submodule update --remote --merge

This will update the submodule to the latest remote commit. You will then need to commit the change so the gitlink in the parent repository is updated

git commit

Change 'eol' for all files from CLRF to LF in Visual Studio Code

git config core.autocrlf false 

git rm --cached -r . 
git reset --hard