Install Nagios Plugins to monitor services on remote servers

Thanks murrant and laf. Greatly appreciated.

I followed steps on doc Home - LibreNMS Docs and installed Nagios plugins on LibreNMS server.

After checking the argument options, configured a test service check on a remote server ‘report’ with IP 172.16.9.76:
image
the error message on LibreNMS


Looks like that LibreNMS requires login credentials to the OS in additional to login credentials to MySQL.

Any where I can configure login credentials to the OS of the remote server on LibreNMS?

Any help would be greatly appreciated.