Install libnews-article-nocem-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libnews-article-nocem-perl
module to generate accurate NoCeM notices
News::Article::NoCeM is an extension to News::Article that allows the easy and accurate creation of NoCeM notices for Usenet articles. . NoCeM is a mechanism to cryptographically authenticate cancel (hide) control messages on usenet. The NoCeM FAQ is available on the web at http://www.cm.org/faq.html.