Nagios: NRPE: Command check_dns not defined

You may get the error "NRPE: Command 'check_nrpe' not defined" if we have not added the required entry in "/usr/local/nagios/etc/nrpe.cfg" in the server being monitored


Edit the file in the server which is to be monitored and add a line like

command[check_dns]=/usr/local/nagios/libexec/check_dns -H localhost

and restart the xinetd