To be added locally on the VZ HN to <code>/etc/nagios/nrpe_local.conf</code>and as a standalone script run with cron.

Works as nagios-plugin with option '-fc' or reports an increase of a failcnt-value by mail if run e.g. as a cronjob with option '-ti'. We use it with both cases to be sure that we see a peak in case it happened between the nagios-checks.