Thanks, once I had the Release.key installed, I was able to install version
2.1.1.
On Sat, Feb 24, 2018 at 1:07 PM, Vladimír Čunát <vladimir.cunat(a)nic.cz>
wrote:
  On 02/24/2018 09:42 PM, Paul Hoffman wrote:
  For example, when using the instructions you
gave, I get.
 W: GPG error:
 
http://download.opensuse.org/repositories/home:/CZ-NIC:/ 
knot-resolver-latest/xUbuntu_16.04
  Release: The following signatures couldn't be
verified because the
 public key is not available: NO_PUBKEY 74062DB36A1F4009 
 There are multiple ways you can use.  In case you want this one, at the
 end of the page there's information how to add the keys.  (I haven't
 tested this, but the key seems fine, as judged by my gpg.)
 wget -nv 
https://download.opensuse.org/repositories/home:CZ-NIC:knot-
 resolver-latest/xUbuntu_16.04/Release.key -O Release.key
 sudo apt-key add - < Release.key
 sudo apt-get update
 --Vladimir