How to configure newsgroup?

rn was also notable for three other features it introduced: KILL files, "do the right thing", and automatic configuration. The KILL file was a file (called, obviously enough, KILL) containing regular expressions matched against the subjects of news articles in each group; if an article matched, it would be marked as having already been read. This feature proved essential as the growth of the Usenet made it impossible to read every article in even a limited selection of newsgroups.