How to solve this?
sudo wget -O - https://debian.neo4j.org/neotechnology.gpg.key | sudo apt-key add -
--2018-07-07 17:23:46-- https://debian.neo4j.org/neotechnology.gpg.key
Resolving debian.neo4j.org (debian.neo4j.org)...
failed: Name or service not known.
wget: unable to resolve host address ‘debian.neo4j.org’
gpg: no valid OpenPGP data found.