2007/7/20, Aidan Anderson <<a href="mailto:mail@aidananderson.co.uk">mail@aidananderson.co.uk</a>>:<div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Have you set up the command definition correctly in commands.cfg or wherever you store your commands on your Nagios server. Also check that Nagios has permission to execute the pluggin on the remote machine. Test by re-trying your check_nrpe command logged on as nagios. </blockquote><div> Yes, I setted up the command definition for check_nrpe on the Nagios server as the following: define command{ command_name check_nrpe command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -a $ARG2$ } The command in the host configuration on the Nagios server is confgured as the following: define service{ use remote-service host_name my.remote.server service_description SMART check_command check_nrpe!check_smart_attributes } If I test the command logged on as nagios on the Nagios server it works: nagiosserver:/home/me# su nagios nagiosserver:/home/me$ whoami nagios nagiosserver:/home/me$ /usr/local/nagios/libexec/check_nrpe -H backuppc.foobar.local -c check_backuppc BACKUPPC WARNING - (4/7) failures nagiosserver:/home/me$ As you can see, it works, but it doesn't works from Nagios itself. Bye! </div></div>