this node requires Ruby and following ruby gems: json, whois, whois-parser installed on the server running nodered

  apt install ruby-full rubygems
  gem install json whois whois-parser

in case you are working with nodered in docker container, you may need the root access to install ruby.

docker exec will allow you to login as root

docker exec -u 0 -it mynodered bash

then you can install ruby with

  apk update
  apk add ruby-full

• https://github.com/weppos/whois-parser whois parsing project used
• https://www.ruby-lang.org/en/documentation/installation/ ruby installation (package manager is simplest)