I am searching for a way to automatically add a few hundreds of hosts to ping in Nagios.
I guess there could be procedure or a file to fill with something like an /etc/hosts
file to have Nagios to simply ping these hosts.
another common service would be to probe for ssh availability.
use template like this:
Template:
for generate .cfg file for all servers from file,like hosts - you may create shell script.
And use crontab for run it and reload nagios service.