How to use nagios's check_udp for Monitoring ntpd?

Question

I want monitor my ntpd services and ntpd service is used udp protocol。nagios have a method that is named check_udp,As follows： [root@localhost]# ./check_udp -H 127.0.0.1 -p 123 With UDP checks, a send/expect string must be specified.

I want to know how to use check_udp...

Answer 1

I suggest saving yourself some effort and use one of the many NTP nagios plugins like the one below from the official nagios plugins package.

http://nagiosplugins.org/man/check_ntp_peer