This article is part of a 2-part series about installing and configuring Nagios on Ubuntu 14.04.
- Part 1: Nagios Server
- Part 2: Remote Host
Nagios is a popular server monitoring software suite which can help greatly improve the uptime of your application. In this guide, I’m going to show you how to install Nagios on Ubuntu 14.04.
You need a LAMP stack installed on your server to be able to use Nagios. If you would like to learn how you can do this on Ubuntu, please refer to the guide: How to Install Apache, MySQL, and PHP on Ubuntu
Step 1: Installing prerequisites
Aside from a functioning LAMP stack, there are three prerequisites. Install them with
apt-get install build-essential libgd2-xpm-dev apache2-utils
Step 2: Creating a group and user
For Nagios, we need to create a group and user. First off, create the user:
useradd -m nagios
If you didn’t give it a password yet, do this with the
We will now create the Nagios group:
Add the Nagios user to the Nagios group:
usermod -a -G nagcmd nagios
And add the
www-data user to the Nagios group:
usermod -a -G nagcmd www-data
Step 3: Downloading Nagios
Now, we can download Nagios. Install
wget now, if you don’t already have it installed:
apt-get install wget
Then, download the Nagios files:
wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-4.0.8.tar.gz wget http://nagios-plugins.org/download/nagios-plugins-2.0.3.tar.gz
tar xzf nagios*
And finally, navigate to the directory:
Step 4: Installing Nagios
Now that our server is setup, we can compile and install Nagios.
./configure --with-command-group=nagcmd make all make install make install-init make install-config make install-commandmode make install-webconf
Step 5: Configuring the Nagios web interface
Nagios features a web interface for easy management. For security purposes, you should limit who can access the web interface with either a firewall or a password-protected Apache configuration.
service apache2 restart
Start the Nagios service:
service nagios start
Continue to: Part 2: Remote Host
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