Standard Nagios Plugins.

There are various plugins offered by Nagios exchange itself, among them some are basic or standard ones which are needed in nearly every host monitoring.

Those are - disk_check, mem_check, cpu_check, proc_check, load_check, etc.

These come together in an archive and can be downloaded from -

https://www.nagios.org/downloads/nagios-plugins/

A common template can be made for services using these plugins which can be enabled to whenever a new host is added to enable basic monitoring on the added host.