Hi, one month ago I upgrade my CUDA version because of some package dependencies, now I want to update pc this error raises in terminal, I have searched many issues related to mine but any solution could solve my error.

GPG error: file:/var/cudnn-local-repo-ubuntu1804- InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B695BAFC77B32ECB

Please see this:

I have already tried it but nothing changed.

Ok, please try this then:

There is not any info about ubuntu 18.04 version for x86_64

Import the CUDA GPG key.

    sudo cp /var/cudnn-local-*/cudnn-*-keyring.gpg /usr/share/keyrings/

Refresh the repository metadata.

    sudo apt-get update

doesn’t work?

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Strange, I triied it before same error raised now I tried again it seems solved my problem, thanks!

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