So after looking at the basic examples its time to configure the check.
First a few tips:
Consider a long check_interval of several hours especially if you have set the crawl switch.
For some specific pages like the start page of a site, it may make sense to choose a lower check_interval.
Huge sites may need a very long timeout with --crawl. Consider to switch to passive checks it that begins to hurt you.
We have prepared an example configuration in the archives etc/ folder. It will need a bit of tuning especially in the hosts section.
From this point on you probably have to tune the configuration a bit more and tell it, what exactly you want it to check and which false-positives it should ignore.
The chapter Advanced Examples will show you some
possibilities. Please also consider reading the
the programs --help.