Hello again, Thanks for the tips so far. Now some responses; On the monitored host, I have setup nrpe.cfg and therein I have set the option "allowed_hosts=<IP of monitoring server>" and also revised the format as shown below; #specific commands# command[check_disk]=/usr/local/nagios/libexec/check_disk -w 30% -c 15% -p / -p /var -p /var/opt/BGw/Server1 -p /var/opt/mediation/ora command[check_swap]= /usr/local/nagios/libexec/check_swap -a -w 10% -c 5% command[check_procs]=/usr/local/nagios/libexec/check_procs -w 300 -c 400 command[check_ssh]=/usr/local/nagios/libexec/check_ssh -4 -t 10 -p 22 localhost command[check_ftp]=/usr/local/nagios/libexec/check_ftp -t 5 Then on the monitoring server, I have also setup the monitored host file (host.cfg) with the service description as follows; define service{ use generic-service ; Name of service template to use host_name emm4 service_description Root Partition check_command check_nrpe!check_disk!15%!10%! } After setting up all this, I refreshed the nrpe client on the monitored host and also restarted the nagios service on the monitoring server, this is after I checked that there were no errors whatsoever in the nagios configuration files. And yes, I logged into the monitored host as the nagios user and was able to verify that the check_nrpe command definition does run successfully. When I log into the nagios web GUI, I'm able to see the alerts, warnings and details for the check_swap, check_procs, check_ssh and for check_ftp. For the case of check_disk, I only see alerts/warnings and details only for the root (/) partition and NOT those for the /var, /var/opt/BGw/Server, /var/opt/mediation/ora. This is despite the fact that these partitions are defined in the nrpe.cfg file on the monitored host as shown above. This is still puzzling....