I'm trying to update my nodejs installation, and phalconphp is getting in the way. When I run
apt-get update, I get this complaint
Err:13 https://packagecloud.io/phalcon/stable/ubuntu xenial InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 4166E80CDCF8B31B
Following the advice of several threads (such as this one), I've tried to fetch the GPG key:
sudo gpg --keyserver hkp://keyserver.ubuntu.com:80 --recv 4166E80CDCF8B31B
gpg: requesting key DCF8B31B from hkp server keyserver.ubuntu.com gpgkeys: key 4166E80CDCF8B31B not found on keyserver gpg: no valid OpenPGP data found. gpg: Total number processed: 0 gpg: keyserver communications error: key not found gpg: keyserver communications error: bad public key gpg: keyserver receive failed: bad public key
So how do I figure out which server should have the GPG key?