To import a nagios 3 configuration we need to prepare the nagios configuration files first, after that we can use the import script to import the files into op5 Monitor.
Create a new file called templates.cfg in which you manually add both your host-templates and your service-templates. These are usually located in hosts.cfg and services.cfg.
Create a nagios pre-cache file by stopping nagios and start it with the -p option. this is done from you nagios binary directory, usually β/usr/local/nagios/bin/β.