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I want to define new command in nagios for remote host but i can't find out where should i write this thing

define command { }

on remote host i have only this file

 vim /usr/local/nagios/etc/nrpe.cfg

Should i write that in above file or i have to write that on nagios host not on remote computer

There is no commands.cfg file on my remote host

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3 Answers 3

Reset to default
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Which Nagios packages do you have installed? On my CentOS 5.4 boxes, the Nagios config is in /etc/nagios. Take a look there. The filename is /etc/nagios/nagios.cfg

Edit

On the remote side, you need an entry in the nrpe.cfg that looks like command[something]=/some/path/to/command/binary. Then, on the Nagios host, you do your define service { }. The important part is that the command to run is going to look like check_nrpe!something, where something is the same as the one in nrpe.cfg.

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  • i have nagios 3.2. and i am talking bout remote machine. the only cfg file i have is /usr/local/nagios/etc/nrpe.cfg I am taking about NRPE plugin Commented Aug 23, 2010 at 1:38
  • Actually i have that nagios.cfg but that is on host where nagios monitoring system is installed. i am talking about where nagios plugin and NRPE plugin is installed. where do i have to define command and in which file. EITHER on host or remote computer Commented Aug 23, 2010 at 1:43
  • Oh, ok. You need to have two parts for NRPE to work. I'll update my answer with it so I can get some formatting. Commented Aug 23, 2010 at 1:57
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If you are configuring to monitor a remote host, you will have to add a command in your nrpe.cfg found at /usr/local/nagios/etc/.

This command should be on the remote host. The sample commands that are already defined are :

/usr/local/nagios/libexec/check_nrpe -H localhost -c check_users /usr/local/nagios/libexec/check_nrpe -H localhost -c check_load /usr/local/nagios/libexec/check_nrpe -H localhost -c check_hda1 /usr/local/nagios/libexec/check_nrpe -H localhost -c check_total_procs /usr/local/nagios/libexec/check_nrpe -H localhost -c check_zombie_procs

Then adding the command definition to the any of the config file that you have specified in nagios.cfg 

define command{ command_name check_nrpe command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ }

And finally your host and service

Correct me if i am wrong. I am not sure if nagios would reset the settings back to default for commands.cfg.

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You can define the commands in the file /usr/local/nagios/etc/objects/commands.cfg on the nagios host. Open that file and you should see examples for the syntax there.

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