How to Install Nagios on POP! OS Latest

Nagios is a popular open-source monitoring tool used for network monitoring, system monitoring, and infrastructure monitoring. In this tutorial, we will go through the steps to install Nagios on POP! OS Latest.

Prerequisites

Before installing Nagios, make sure your POP! OS Latest system is updated with the latest software packages. You can do this by opening a Terminal and running the following command:

sudo apt update && sudo apt upgrade -y

Install Dependencies

Before installing Nagios, you will need to install some dependencies. Run the following command to install those dependencies:

sudo apt install -y autoconf gcc libc6 make wget apache2 php libapache2-mod-php7.4 libgd-dev unzip

Download Nagios

Download the Nagios installation archive using the following command:

wget --no-check-certificate -O nagios.tar.gz https://github.com/NagiosEnterprises/nagioscore/archive/nagios-4.4.6.tar.gz

Once the download is complete, extract the archive using the following command:

tar -zxvf nagios.tar.gz

Change to the nagios directory using the following command:

cd nagioscore-nagios-4.4.6/

Install Nagios

Now execute the following commands to compile and install Nagios:

./configure --with-httpd-conf=/etc/apache2/sites-enabled
make all
sudo make install
sudo make install-init
sudo make install-commandmode
sudo make install-config
sudo make install-webconf

During the installation process, it will ask you to create a Nagios admin user. Provide the username and password for the Nagios admin user.

Install Nagios Plugins

You will also need to install Nagios plugins. To install it, run the following commands:

cd ~
wget --no-check-certificate -O nagios-plugins.tar.gz https://github.com/nagios-plugins/nagios-plugins/archive/release-2.3.3.tar.gz 
tar -zxvf nagios-plugins.tar.gz
cd nagios-plugins-release-2.3.3/
./tools/setup
./configure
sudo make
sudo make install

Configure Apache

Open Apache configuration file by executing the following command:

sudo nano /etc/apache2/sites-enabled/nagios.conf

Modify the following lines and save the file:

ScriptAlias /nagios/cgi-bin "/usr/local/nagios/sbin"

DocumentRoot /usr/local/nagios/share

<Directory /usr/local/nagios/share>
    Options None
    AllowOverride None
    <IfVersion >= 2.3>
        Require all granted
    </IfVersion>
    <IfVersion < 2.3>
        Order allow,deny
        Allow from all
    </IfVersion>
</Directory>

Restart Apache

Finally, restart Apache using the following command:

sudo systemctl restart apache2

Now, Nagios should be installed and accessible via a web browser using the URL http://localhost/nagios. You will use the Nagios admin username and password you created earlier to log in.

Conclusion

In this tutorial, we have gone through the steps to install Nagios on POP! OS Latest. Now you can start using Nagios to monitor your network resources.