Posted on

How to fix: GPG error: http://deb.opera.com stable InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY

To just add the missing keys, this command should work (replace the “63F7D4AFF6D61D45” string with your actual missing keys)

$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 63F7D4AFF6D61D45
Leave a Reply

Your email address will not be published. Required fields are marked *