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-ubuntu1804-8.6.0.163 InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B695BAFC77B32ECB