Nagios Support Forum

I have Ubuntu 12, with Apache installed and running, i also installed the nagios update
i used the Linux wizard, and i have a couple issue

1. Apache Web Server Critical 41m 3s 5/5 2012-05-24 11:35:10 NRPE: Unable to read output

2. CPU Stats Unknown 40m 34s 5/5 2012-05-24 11:35:39 UNKNOWN: iostat not found or is not executable by the nagios user.

Thanks for all the help

1. It is possible apache is running under a different name than was specified in the wizard by default.

2. You likely need to install sysstat

ronb@ubuntu:/$ sudo apt-get sysstat
[sudo] password for ronb:
E: Invalid operation sysstat
ronb@ubuntu:/$ apt-get sysstat
E: Invalid operation sysstat
ronb@ubuntu:/$ sudo apt-get sysstat
E: Invalid operation sysstat
ronb@ubuntu:/$ sudo apt-get sysstat
E: Invalid operation sysstat
ronb@ubuntu:/$

That command does not run.
This is on a clean Ubuntu 12 install as a vm, just for testing Nagios.

Sorry, I missed the install keyword

Silly question, do I install this on Ubuntu, or nagios vm?

I ran this on the ubuntu vm, still getting the same critical error

This was for the following error

UNKNOWN: iostat not found or is not executable by the nagios user.

actually looking again the critical error looks like your NRPE config might not have the command you are calling specified.

What wizard are you running? What procedure did you follow to install the agent on this Ubuntu machine?

i used the ubuntu/debian agent installation instructions from the linux wizard.

Linux wizard

here is the command in nagios

check_nrpe!check_init_service!-a 'httpd'

Re: Apache issue

Go to the Core Config Manager->Monitoring->Services->Config name filter: <your_Ubuntu_box> ->Apache Web Server->Modify->Common Settings tab - change:
to Click on "Save" and "Apply Configuration".

Re: iostat

In order to install iostat on your client machine (Ubuntu box), run in terminal:
Run a test check - run the following commands in a terminal on your Nagios server:
Hope this helps.