Nagios Plugins Install


Install Nagios Plugins Download the latest stable release of Nagios Plugin from the given link copy nagios plugin link address and download it to your server. /configure --with-command-group=nagcmd #make all #make install #make install-init #make install-config #make install-commandmode 5. The plugin can monitor either a single ESXi/vSphere server or a VirtualCenter/vCenter Server and individual virtual machines. Through on this article you will get idea on how to install and configuration for Nagios 4. Nagios Core Installation is simple and easy process but when your doing for the first time you will little bit confused, Installation of Nagios core is plays major role because while installing we have to run configure as nagcmd group or else all the file permissions and configuration files we have to change later. Most large installations should probably use NRPE for security and scalability. 3 Open up the terminal. Nagios check plugins For those unfamiliar with Nagios, it is a monitoring system which can execute checks. After installing Nagios on our server, the next step is to install the Nagios agent. “From project planning and source code management to CI/CD and monitoring, GitLab is a complete DevOps platform, delivered as a single application. Will it run for all devices? For all Linux boxen? For all web pages?. This comprehensive Linux guide expects that you run the following commands as root user but if you decide to run the commands as a different user then ensure that the. In this post we will setup the nagiosgraph plugin to graph performance data of our monitored host and services. x using RPMForge repository. 1/ The following commands will check your system for missing libraries and binaries and prepare the Nagios Plugins source code for the build process:. Post Install Tasks. This tutorial describes how to install and configure Nagios Core on a CentOS 7 server. Install nagios-plugins-udp. [1] Install nrpe on Nagios server and on remote server you'd like to watch. After enabling EPEL repository, use following commands to install NRPE and plugins in your system. Following are some of the features of nagios. So open the Nagios plugin files directory & then we will compile & install the plugins. While I will be defining how to download and compile NRPE so that you can install it on any machine or version, CentOS 6 has a repos named: nrpe. Plugins process command-line arguments, perform a specific check, and then return the results to Nagios Core. nagiosgraph creates graphs and generates HTML pages with graphic reports from the data. We need to install Apache, PHP and some libraries like gcc, Step 2: Create Nagios User and Group. 2 server pre-installed, plus SDT connector plugins - and they auto-detect and auto-synch with the devices to be monitored, so a Lighthouse management solution can be set up in minutes. Change into the directory where you downloaded them, and unpack them. 8 on the latest fully updated CentOS 7 minimal installation - Install Nagios on CentOS 7. This lab goes through the procedure of compiling and installing Nagios Core directly from the source. Nagios or Nagios Core is an open-source IT monitoring, server, network monitoring, and application monitoring tool. In this post we will setup the nagiosgraph plugin to graph performance data of our monitored host and services. It alerts the users when things go wrong and alerts them a second time when the problem has been resolved. 1/ Run the following commands one by one to compile and install it. Using the Plugin. NRPE can be used when SNMP should, or can, not be used. Nagios was originally designed to run under linux,although it should work under most other unices aswell. Compiling NRPE and nagios-plugins for Solaris 11. This guide helps to fix that by using the latest Nagios version. I already tried many tutorials over the internet trying to setup nagios and centreon to work together in centOS 6. /conffile)? If you su to the Nagios user and attempt to execute said plugin (with config), does it work?. /tools/setup #. Just follow the steps in this tutorial and you install Nagios on your VPS very fast. The nagios_nsca output is used for sending passive check results to Nagios through the NSCA protocol. Plugins –Nagios extensions • Built-in plugins – Aren’t truly built-in, but they come standard when you install nagios-plugins • check_disk • check_ping • Custom plugins – Let you test anything – The sky’s the limit - if you can code it, you can test it. Once Nagios is installed and configured, we can download and install the latest nagios-plugins. In this article, we will figure out how to introduce Nagios in openSUSE 15. Before we can use Nagios to monitor something, we need to install the monitoring plugins. Setup and configure Nagios Client (NSCA) on CentOS/RHEL 6. check_rss allows you to parse these feeds either looking for certain keywords that exist (or don't) or the date of the last post. This tutorial explains how to install, configure and monitor RabbitMQ Server using check_rabbitmq plugin. pl script that’s included in the contrib folder of the official Nagios Plugins. Installing Nagios 4. 4 and Nagios Plugin 2. In this section we describe how to download and install the jmx4perl plugin to a Nagios server. This document is intended for use by anyone who wishes to install Nagios Core on a Centos 7 minimal machine. Aside from the normal usage as an individual test harness, WebInject can run in a mode that allows it to be used as a plugin for Nagios. In this post, you have learned how to install Nagios on RHEL 8 and configured Nagios to monitor the services with the help of Nagios plugins. All the plugin's are located at: /etc/nagios-plugins/config. I have installed Nagios in my ec2 server. Official Nagios plugins are developed and maintained by the official Nagios Plugins team. In this tutorial, we will cover the installation of Nagios 4, a very popular open source monitoring system, on Ubuntu 14. In most enterprise environments Zabbix is the better tool to use. We will monitor our Linux Host using NPRE. This allows the status of the LSI 9260-4i RAID controller to be monitored. After installing your CentOS/RHEL server, you have to install dependent packages to make nagios work. Before we can use Nagios to monitor something, we need to install the monitoring plugins. It needs to be installed on both Linux host & on Nagios server. I checked around but cannot determine what needs to be done to correct this issue. I have installed Nagios in my ec2 server. Through on this article you will get idea on how to install and configuration for Nagios 4. For information on detailed changes that have been made or plugins that have been added, read the NEWS file. Step 2 : Install NRPE plugin. Install Nagios plugins: Go to the directory where you downloaded the nagios plugins, and extract it. Nagios Plugins - Installing Nagios Plugins From Source onto the machine you are installing Nagios Plugins as the located in /usr/local/nagios. so rather than running it on a machine that itself was constantly crashing I decided to move it onto Amazon Web. Finally install the Nagios Plugins using. Installing Nagios on Solaris January 21, 2008 by James Mernin 10 Comments If you are not familiar with it, Nagios is an open source system and network monitoring application that keeps a watchful eye on hosts and services that you specify, alerting you when things go bad and when they get better. Then add the plugin to your configuration with the required parameters for whatever server you want to use with. Installing The Plugins. Step 2 – Install NRPE and Nrpe-plugins. Install Nagios Plugins. 04 desktop with the old Desktop GUI. to display IT processes like a mail system or a network infrastructure. First install nagios-plugins-all. If the commands are not working from…. Note the package name, it is nagios-plugins-and follow by the plugin name. We can fix this by deleting libexec folder and link it to nagios plugins install location – copy eventhandlers. 0 for Nagios XI, you must extract the component-specific files on the systems. This is due to check_disk command is not defined in the client machine nrpe. In the previous article, i have guide you on how to install Nagios Core, mainly for network and services monitoring. It is not able to install check_logfiles plugin via yum on CentOS. When installed and appropriately configured, the plugin creates Opsgenie alerts when a Nagios XI. Install the Nagios-plugins release. According to the Nagios Install Manual, you need to run the command "update-rc. There’s a number of ways you can do it. How does Nagios work? So how does Nagios monitor something? First of all, we install Nagios on a system and we call it Nagios server. Nagwin has already a small set of plugins ready to use in the /plugins directory, and there are a large number of plugins available at Nagios Exchange. There are several tasks that we need to do to get our nrpe connections setup properly. gz # cd nagios-plugins-1. Add service definition which contains the right action_url2. All of the steps below were tested on the operating systems (OS) listed after a clean install of the OS. The Nagios Plugins Development Team is proud to announce that nagios-plugins 2. The plugin package contains the following files:. The apacherequests. Step 7: Compile and Install Nagios Plugins # cd /root/nagios # nagios-plugins-2. To resolve this issue login to client server and edit the following file and upend this entry. In this section we describe how to download and install the jmx4perl plugin to a Nagios server. yum install httpd php gcc glibc glibc-common gd gd-devel openssl-devel 2) Create nagios user and group by which we will be installing nagios. First launched in 1999, Nagios has grown to include thousands of projects developed by the worldwide Nagios community. Then if Nagios has released a new version, and I haven't changed the Playbook yet you can modify the other variables. Insight: Install Nagios Monitoring Tool On RHEL 8 In this tutorial, we will show you the method to install the Nagios monitoring tool on Redhat operating system. The following steps will walk you through installing Nagios Plugins. Read More: How to Install and Configure Nagios on RHEL/CentOS. Command names, paths, etc. For example the SNMP packages are installed as part of the Nagios Plugins section, as SNMP is not required by Nagios Core. 4 and Nagios Plugins 2. x – Apache / Nagios 4. It needs to be installed on both Linux host & on Nagios server. These plugins will send information to the Scheduler, which displays that in a GUI. メモリ監視用のプラグイン check_mem. So open the Nagios plugin files directory & then we will compile & install the plugins. If you are installing on ESXi/VMWare as a virtual machine, go ahead and add the VM tools as well. Make sure that you have the following packages installed. Download and Install. There’s a number of ways you can do it. How to install and configure nagios nrpe client in Ubuntu with apt-get command A few days back I wrote on how to configure nagios server in Ubuntu 12. ) o Plugin interface to allow for user-developed service checks o Contact notifications when problems occur and get resolved (via email, pager, or user-defined method) o Ability to define event handlers to be. Step 5 – Install Nagios Plugins. In order for Nagios to be of any use to you, you're going to have to download and install some plugins. I also need to explain you NRPE (Nagios Remote Plugin Executor). I am using only nagios server and i dont have /usr/local/nagios/libexec this directory and tell me what i have to do???? and i am getting return code of 127 plugin may be missing. The check types and alert timers are fully customizable. At this point, compile and install the plugins. At this point, a reboot is probably a good idea if you haven’t already. Install Nagios plugins: Go to the directory where you downloaded the nagios plugins, and extract it. Plugins –Nagios extensions • Built-in plugins – Aren’t truly built-in, but they come standard when you install nagios-plugins • check_disk • check_ping • Custom plugins – Let you test anything – The sky’s the limit - if you can code it, you can test it. We need to install Apache, PHP and some libraries like gcc, Step 2: Create Nagios User and Group. Demo of creating a nagios plugin with a simple bash script. Respons time forces the plugin in a OK, Warning or Critical state. The apacherequests. Set a static IP address. Nagios is very lightweight monitoring tool. FAQ The FAQ section offers additional information on the Nagios Plugins package as a whole. Download Official. Machine specs are OS: RHEL5 # cat /etc/redhat-release Red Hat. make all Step 7 − Run the command shown below to install all the Nagios files. Nagios or Nagios Core is an open-source IT monitoring, server, network monitoring, and application monitoring tool. At this point, compile and install the plugins. What is Nagios? Nagios is an open source application through which we will have the opportunity to take centralized monitoring of the equipment and the network at our expense in a simple way. The monitoring daemon runs intermittent checks on hosts and. Nagios is an open source monitoring tool for the network devices. # cd nagios-plugins-release-2. com linux tips, Nagios 4. 1_8,1 net-mgmt =95 2. 0 has been released and is available for download. How to install and configure Nagios on Linux. This tutorial shows how to install Nagios 4. Nagios is an open source host, service, and network monitoring program. A large number of tools are also being distributed, which makes the implementation of an efficient monitoring platform much easier. The installer is packaged as a. We can experience its greater compatibility and functionality all the way. /configure Once the configuration is completed start the compilation process using the make command: make. The address of the new host is nagios-client and its being resolved to the correct address because of the hostmanager plugin which dynamically edits /etc/hosts file and added the correct IP addresses of nagios-client machine. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Nagios Network Monitoring System Tutorials and Helpful Resources. I have some plugin VSTs I want to install but IDK how. Project Participants. Nagios is now installed. It is very simple to do. Just follow this simple article and you will be up and running with NRPE on Nagios clients as well as on the Nagios server which needs to communicate to clients via nrpe agent. SELinux is a mandatory access control (MAC) system on Linux which adds a fine-grained permission system for access to all system resources such as files, devices, networks and inter-process communication. Install nagios on Mac OSX; Install tcptrack on Mac OSX;. With regard to downloading Nagios, the source files can be pulled from the company's website or using wget. Nagios - One of the popular Open Source Monitoring tool. It's best to get those and install them now too. In this tutorial, we will cover the installation of Nagios 4, a very popular open source monitoring system, on Ubuntu 14. $ sudo apt-get install nagios-plugins nagios-nrpe-server. Please help. 3 (Nagios web frontend) installation with Screenshots. How to install and configure nagios nrpe client in Ubuntu with apt-get command A few days back I wrote on how to configure nagios server in Ubuntu 12. Change to the nagios plugins directory: cd nagios-plugins-2. Therefore, in the case of failure Nagios core can alert the technical staff about the issues. /configure Once the configuration is completed start the compilation process using the make command: make. Read More: How to Install and Configure Nagios on RHEL/CentOS. Client NRPE Install. Then add the plugin to your configuration with the required parameters for whatever server you want to use with. This daemon, which runs on Unix under the inetd or xinetd daemon, will receive alerts in Big Brother format and then pass them on to Nagios. NRPE requires that Nagios plugins is installed on the remote host. Installing Icinga2 on Debian. Writing Custom Nagios Plugins The process of writing essays for students First of all, we will collect and use all the necessary data to write college essays: critical articles about writing essays, information from …Plugins –Nagios extensions • Built-in plugins – Aren’t truly built-in, but they come standard when you install nagios. Percona Monitoring Plugins for Nagios¶ Many of the freely available Nagios plugins for MySQL are poor quality, with no formal testing and without good documentation. GitHub Gist: instantly share code, notes, and snippets. VMware: Install in NagiosXI the VMware Plugin including VMware SDK October 3rd, 2010 sanderdaems Leave a comment Go to comments I’m running NagiosXI in my testlab, to monitor my ESX hosts/VM’s I need to install the Nagios VMware Plugin. Nagios Plugins. I also need to explain you NRPE (Nagios Remote Plugin Executor). Learn how to use Nagios to monitor system health and gain actionable intelligence about your IT infrastructure, in this course with instructor and DevOps engineer Josh Samuelson. Then navigate to the unpacked folder: 3. The official Nagios Plugins package contains over 50 plugins to get you started monitoring all the basics. NRPE can also communicate with some of the Windows agent add-ons, so you can execute scripts and check metrics on remote Windows machines, as well. Basic Plugin Documentation. Nagios will be configured to monitor a few aspects of your local system (CPU load, disk usage, etc. # cd /tmp # tar -xvzf nagios-plugins-1. Checkout how to install Nagios 4. Nagios plugins are stand-alone extensions to Nagios core that provide the low-level intelligence on how to monitor anything and everything with Nagios core. So CentOS 7 is out and there are quite some differences from it's predecessor CentOS 6. 2 version of nagios core & 2. 5 check_http Command Examples 1. This package includes example templates, showing how to install the daemon on the Nagios server and how to define Nagios passive services so that Big Brother alerts can be accepted. Easy Install nagios vshell on Centos. org/pub/epel/6/. Click the Browse button to select the new plugin you want to install. Use appropriate Nagios plugins installation instructions if another distribution has been selected. What emerged when I was done was. Also Install basic plugins to monitor nagios server itself. Install and Configure Nagios for PostgreSQL/PPAS on Linux One of my Colleague had asked how he can use Nagios for PostgreSQL Monitoring. 1 and Nagios Plugins 2. Install and configure NAGIOS on CentOS 7. Step 7: Configure check_nrpe command. /usr/local/nagios/libexec). It alerts the users when things go wrong and alerts them a second time when the problem has been resolved. Step 2: Install NRPE and NRPE-plugins. Let us now install Nagios Remote Plugin Executor(NRPE) that allows us to execute commands on a remote host using Nagios web interface for monitoring and collecting system metrics from a remote host. 1 Version of this port present on the latest quarterly branch. By default, the installation does not come with any plugin. sh) are required by most (if not all) of the nagios-plugins-* packages. x or CentOS 7. to display IT processes like a mail system or a network infrastructure. Nagios Core - Installing on Centos 7 This document describes how to install Nagios Core 4. If you only have one server. Watch Aaron show you this powerful feature then subscribe above for more great videos!. For example, if you have 2 nagios outputs. 2 and Nagios plugins version is 2. This page talks about how to install and configure Nagios Server and Nagios Remote Plugin Executor Server (NRPE). Nagios Core Installation is simple and easy process but when your doing for the first time you will little bit confused, Installation of Nagios core is plays major role because while installing we have to run configure as nagcmd group or else all the file permissions and configuration files we have to change later. Generate a password for the user nagiosadmin by using the below command. The following shell commands must exist and be executable by your Nagios user: snmpwalk, awk, grep, wc, cut - SNMP must be enabled on the Dell Equallogic device. /configure # make # make install 12. Installing Nagios 4. In this blog, we will show you how to add Linux host to Nagios monitoring server using nrpe plugin. Let us now install Nagios Remote Plugin Executor(NRPE) that allows us to execute commands on a remote host using Nagios web interface for monitoring and collecting system metrics from a remote host. I also need to explain you NRPE (Nagios Remote Plugin Executor). Just follow this simple article and you will be up and running with NRPE on Nagios clients as well as on the Nagios server which needs to communicate to clients via nrpe agent. Nagios check plugins For those unfamiliar with Nagios, it is a monitoring system which can execute checks. Install Nagios plugins: Go to the directory where you downloaded the nagios plugins, and extract it. What emerged when I was done was. 8 in Ubuntu, Nagios 4. Note: This contrib does not work on SME8b6 as documented here, there are a few changes needed to the repository info and also the yum commands, also a change needs to be made to the location of the nagios. This tutorial explains how to install and configure Nagios on Linux. Install and Configure Nagios for PostgreSQL/PPAS on Linux One of my Colleague had asked how he can use Nagios for PostgreSQL Monitoring. should be available via pip/easy_install. Step 1: Install Dependencies. fc13 How reproducible: Always Steps to Reproduce: 1. This is where you can find the documentation for most, if not all of the plugins. sudo apt-get install nagios-plugins This will install all plugins to /usr/lib/nagios/plugins directory. Nagios is very lightweight monitoring tool. To compile and install plugins or Nagios plugins from Debian or Ubuntu sources, first, we will install the following dependencies in the system using the following command. Its now possible to install latest Nagios CORE version on Raspbian by following the steps in this article. Let us now install Nagios Remote Plugin Executor(NRPE) that allows us to execute commands on a remote host using Nagios web interface for monitoring and collecting system metrics from a remote host. Installing a plugin In this recipe, we'll install a custom plugin that we retrieved from Nagios Exchange on a Nagios Core server so that we can use it in a … - Selection from Nagios Core Administration Cookbook - Second Edition [Book]. 1 and Nagios Plugins 2. on the Linux host we want to monitor run these commands: refresh the repos sudo apt-get update and then install the nagios plugins and the NPRE server: sudo apt-get install nagios-plugins nagios-nrpe-server lets modify the npre config file to allow our Nagios server to connect to this server sudo nano. Change into the directory where you downloaded them, and unpack them. Prerequisites. The system is plugable which gives administrators the ability to write their own or use hundreds of pre written plugins to monitor their infrastructure. d nagios defaults" to make the service work properly on Ubuntu. Install and configure NAGIOS on CentOS 7. 0 Talend ESB System Management Integration User Guide. In particular Linux, Solaris 10 and Windows agents to allow Nagios to do what it does best and monitor. cfg La configuración se realiza de la misma forma que en la sección anterior, solo que la ruta de los plugins de nagios 1. At the time of this writing, the latest version is Nagios Plugins 2. I'm trying to get a plug-in to work for our Nagios3 install but having never installed a 3rd party plugin before I am unsure why I cannot get it to work with Nagios. Running make on the Nagios Plugins threw me the following error:. Target Audience. This Shell Script is tested on Redhat,Cent-os,Fedora & Ubuntu. Download and Install. Nagios-plugins and NRPE is not available from Centos official repositories, so first of all we need to configure RPMforge> repo from where to install the required packages. This page talks about how to install and configure Nagios Server and Nagios Remote Plugin Executor Server (NRPE). From a terminal on server02 enter: sudo apt-get install nagios-nrpe-server NRPE allows you to execute local checks on remote hosts. Apache is needed to monitor the recent web server status and PHP is required to process the dynamic content on your website. In case the Nagios server is running on a Debian-based system (Debian, Ubuntu or Linux Mint), a necessary package can be installed using apt-get. Nagios Easy Setup Installation Guides. 0 for Nagios XI, you must extract the component-specific files on the systems. Results: "No such file or directory", since the check_udp symlink is dangling. Install Nagios 4. I just finished installing Nagios 3 in Ubuntu server and I'm not sure how I can add a third party plugin into it. Nagios is one of the most powerful network monitoring systems, which is widely used in the industry. Let see about NAGIOS,. 3 Written by Sachin Sharma NSCA (Nagios Service Check Acceptor) is a Linux/Unix daemon allows you to integrate passive alerts and checks from remote machines and applications with Nagios. I have some plugin VSTs I want to install but IDK how. Also Install basic plugins to monitor nagios server itself. This tutorial shows how to install Nagios 3. The first is the Nagios monitoring plugin script (cisco_imc_nagios) which will provide end-user with the capability of monitoring the Cisco IMC of standalone UCS C-Series Servers. To do this, retrieve the latest nagios-plugins release link from here. First install nagios-plugins-all. This document describes how to manage plugins on your Nagios XI system, including: finding and installing new plugins, defining commands, and using them in your services. Nagios was originally designed to run under linux,although it should work under most other unices aswell. Through on this article you will get idea on how to install and configuration for Nagios 4. Find the latest release of Nagios Plugins from the Nagios Plugins Download page. Change the owner of the folder, if it is not nagios:nagios chown -R Nagios:Nagios Nagios-plugins-raabitmq. Installing a plugin In this recipe, we'll install a custom plugin that we retrieved from Nagios Exchange on a Nagios Core server so that we can use it in a … - Selection from Nagios Core Administration Cookbook - Second Edition [Book]. What emerged when I was done was. Download them from their download page. Step 1: Install Dependencies. In this tutorial, we are going to learn how to install and configure NRPE from source for […]. This lab goes through the procedure of compiling and installing Nagios Core directly from the source. how to install nagios on windows 7, how to install nagios on linux step by step, how to install nagios plugins, nagios setup, how to configure nagios on linux, install nagios on redhat 6, install nagios on redhat 7, install nagios on redhat 5, install nagios on rhel5, install nagios on rhel6, install nagios on rhel7. Nagios Web Front-end, Web interface or GUI Tools. To do this, retrieve the latest nagios-plugins release link from here. The plugin is available : Here Thanks in advance for your help. First launched in 1999, Nagios has grown to include thousands of projects developed by the worldwide Nagios community. The nagios_nsca output is used for sending passive check results to Nagios through the NSCA protocol. Step 8: Configure. # Reload Nagios systemctl reload nagios. nagios-plugins-1. In a later article, you'll read how to set up Nagios Remote Plugin Executor (NRPE) as well. I have successfully downloaded and installed Nagios 3. Nagios – How to Install Nagios on Ubuntu 12. Nagios Can't locate utils. To monitor Ceph Storage cluster hosts, install Nagios Plug-ins, the Ceph plug-ins and the NRPE add-on to each of the Ceph cluster's hosts. Let us now install Nagios Remote Plugin Executor(NRPE) that allows us to execute commands on a remote host using Nagios web interface for monitoring and collecting system metrics from a remote host. Make sure that you have the following packages installed. This is why i decided to write a new how to installing Nagios Core 4. Home / Nagios / Operating System / Solaris 10/11 / Solaris Zones / Troubleshooting / How to install nagios client and plugins in solaris 10 How to install nagios client and plugins in solaris 10 Unknown. you can make it executable using chmod ug+x check_jmx4perl also verify that group & owner are equal the the other plugins in that directory. # install from EPEL [[email protected] ~]# yum--enablerepo=epel -y install nagios nagios-plugins. If you need to add new hosts or make changes to existing ones you can find them at: /etc/nagios3/conf. Installing the check_nrpe plugin. This is the long way around, but it comes with advantages such as having the latest version of Nagios Core with all the features. maybe you can do a quick fix by running this command in the same folder as stdio. If you’ve installed Nagios from source, check_httpd command will be located in the /usr/local/nagios/libexec directory. Even installing just nagios-plugins-ping includes nagios-plugins as a dependency, so it looks like the files included in that package (negate, urlize, and utils. Now to verify Nagios installed successfully without errors run the following command. This page talks about how to install and configure Nagios Server and Nagios Remote Plugin Executor Server (NRPE). /configure --with-nagios-user=nagios --with-nagios-group=nagios make sudo make install. With Nagios, you have ultimate control on many aspects of your monitoring ecosystem, ranging from being able to create custom plugins, all the way to explicitly defining execution windows for that host. 6 M Installed size: 6. /configure Once the configuration is completed start the compilation process using the make command: make. Machine specs are OS: RHEL5 # cat /etc/redhat-release Red Hat. The first step in configuring an existing Nagios monitoring server for NRPE is to install NRPE plugin on the server. Nagios and Nagios Related Information Installing check_nrpe Plugin On Nagios Core 4.