How To Install Nagios On Fedora Core

i dont have a step by step tutorial to show you what you need to do to complete the installation but its best that you visit their site, you can find what you are looking for here:

http://nagios.sourceforge.net/docs/3_0/quickstart-fedora.html

i did go there but i kinda like your simple tutorial better, this is all i see there:


Introduction

This guide is intended to provide you with simple instructions on how to install Nagios from source (code) on Fedora and have it monitoring your local machine inside of 20 minutes. No advanced installation options are discussed here - just the basics that will work for 95% of users who want to get started.

These instructions were written based on a standard Fedora Core 6 Linux distribution.

What You'll End Up With

If you follow these instructions, here's what you'll end up with:

* Nagios and the plugins will be installed underneath /usr/local/nagios
* Nagios will be configured to monitor a few aspects of your local system (CPU load, disk usage, etc.)
* The Nagios web interface will be accessible at http://localhost/nagios/

Prerequisites

During portions of the installation you'll need to have root access to your machine.

Make sure you've installed the following packages on your Fedora installation before continuing.

* Apache
* GCC compiler
* GD development libraries

You can use yum to install these packages by running the following commands (as root):

yum install httpd
yum install gcc
yum install glibc glibc-common
yum install gd gd-devel

1) Create Account Information

Become the root user.



Create a new nagios user account and give it a password.



Create a new nagcmd group for allowing external commands to be submitted through the web interface. Add both the nagios user and the apache user to the group.



2) Download Nagios and the Plugins

Create a directory for storing the downloads.



Download the source code tarballs of both Nagios and the Nagios plugins (visit http://www.nagios.org/download/ for links to the latest versions). At the time of writing, the latest versions of Nagios and the Nagios plugins were 3.0.2 and 1.4.11, respectively.



3) Compile and Install Nagios

Extract the Nagios source code tarball.



Run the Nagios configure script, passing the name of the group you created earlier like so:



Compile the Nagios source code.



Install binaries, init script, sample config files and set permissions on the external command directory.



Don't start Nagios yet - there's still more that needs to be done...

4) Customize Configuration

Sample configuration files have now been installed in the /usr/local/nagios/etc directory. These sample files should work fine for getting started with Nagios. You'll need to make just one change before you proceed...

Edit the /usr/local/nagios/etc/objects/contacts.cfg config file with your favorite editor and change the email address associated with the nagiosadmin contact definition to the address you'd like to use for receiving alerts.



5) Configure the Web Interface

Install the Nagios web config file in the Apache conf.d directory.



Create a nagiosadmin account for logging into the Nagios web interface. Remember the password you assign to this account - you'll need it later.



Restart Apache to make the new settings take effect.



6) Compile and Install the Nagios Plugins

Extract the Nagios plugins source code tarball.



Compile and install the plugins.



7) Start Nagios

Add Nagios to the list of system services and have it automatically start when the system boots.



Verify the sample Nagios configuration files.



If there are no errors, start Nagios.



8) Modify SELinux Settings

Fedora ships with SELinux (Security Enhanced Linux) installed and in Enforcing mode by default. This can result in "Internal Server Error" messages when you attempt to access the Nagios CGIs.

See if SELinux is in Enforcing mode.



Put SELinux into Permissive mode.



To make this change permanent, you'll have to modify the settings in /etc/selinux/config and reboot.

Instead of disabling SELinux or setting it to permissive mode, you can use the following command to run the CGIs under SELinux enforcing/targeted mode:



For information on running the Nagios CGIs under Enforcing mode with a targeted policy, visit the NagiosCommunity.org wiki at http://www.nagioscommunity.org/wiki.

9) Login to the Web Interface

You should now be able to access the Nagios web interface at the URL below. You'll be prompted for the username (nagiosadmin) and password you specified earlier.

http://localhost/nagios/

Click on the "Service Detail" navbar link to see details of what's being monitored on your local machine. It will take a few minutes for Nagios to check all the services associated with your machine, as the checks are spread out over time.

10) Other Modifications

Make sure your machine's firewall rules are configured to allow access to the web server if you want to access the Nagios interface remotely.

Configuring email notifications is out of the scope of this documentation. While Nagios is currently configured to send you email notifications, your system may not yet have a mail program properly installed or configured. Refer to your system documentation, search the web, or look to the NagiosCommunity.org wiki for specific instructions on configuring your system to send email messages to external addresses. More information on notifications can be found here.

11) You're Done

Congratulations! You sucessfully installed Nagios. Your journey into monitoring is just beginning. You'll no doubt want to monitor more than just your local machine, so check out the following docs...

hmmm

im sure you can follow thos instructions pretty easy

they are very straight forward if you ask me

thanks dude!! this worked like a charm :)

i get this error:

it appears as though you do not have permission to view information for any of the hosts you requested...
if you believe this is an error, check the http server authentication requirements for accessing this cgi
and check the authorization options in your cgi configuration file.

really tooooooooooooooo good

i have fedora core 8 with a nagios system monitoring tool and it worked for me

assalamualaikum. this is bangaldesh