Provided by: npm_6.14.4+ds-1ubuntu2_all 

NAME
npm-ping - Ping npm registry
Synopsis
npm ping [--registry <registry>]
Description
Ping the configured or given npm registry and verify authentication. If it works it will output
something like:
Ping success: {*Details about registry*}
otherwise you will get:
Ping error: {*Detail about error}
See Also
• npm help config
• npm help npmrc
April 2020 NPM-PING(1)