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I am very new to nagios 3.4.4. I was able to set up and monitor the localhost machine. I tired to copy the localhost config to create a new host, which didnt work. Is there a place where i can find example of a config file monitoring mutiple host? Or a tutorial?

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closed as off topic by Sven, Dave M, mdpc, Scott Pack, Jacob Jun 25 '13 at 19:57

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The short answer: read the Nagios quickstart guide!

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Better yet: read everything under The Basics in docs – Keith Jun 25 '13 at 18:28

You're going to need to install and configure NRPE (or NSClient++ for Windows) on the remote hosts if you want to check load, swap, and other things that are not external-facing services. There are also a lot of plugins that will check the health of well-known external facing services (http, smtp, ssh, etc.).

The Debian and Ubuntu repositories, EPEL, etc., have NRPE.

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Unix & Linux boxes can return values for load, swap, disk space and other simple metrics with an SNMP daemon -- NRPE isn't required for this. – Flup Jun 25 '13 at 13:54
Fair enough; I started with Nagios by monitoring exclusively Windows. I still like NRPE for the ability to write custom checks. – Katherine Villyard Jun 25 '13 at 14:04
Oh don't get me wrong, NRPE is awesome -- but it's quite heavyweight for things like load and disk. – Flup Jun 25 '13 at 14:15

Also, once you have glanced over the Nagios guide as @Flup suggests, I would recommend you to have a look at the amazing NagiosQL project. It makes it all a bit easier...

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