How to Install Nagios on Elementary OS Latest

Nagios is an open-source monitoring tool that helps you keep track of the health and performance of your IT infrastructure. In this tutorial, we will guide you on how to install Nagios on Elementary OS Latest.

Step 1: Update your system

Before starting with the Nagios installation, make sure your system is up-to-date. Open your terminal and run the following command:

sudo apt update && sudo apt upgrade -y

Enter your password when prompted to continue with the upgrade.

Step 2: Install Required Dependencies

Nagios requires several dependencies to function correctly. Install them by running the following command:

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

Step 3: Download Nagios

Next, download the Nagios source code from their official website, https://www.nagios.org/downloads/. You can download the tarball to your home directory using wget:

cd ~
wget https://github.com/NagiosEnterprises/nagioscore/archive/nagios-4.4.6.tar.gz

Extract the downloaded file using tar:

tar zxvf nagios-4.4.6.tar.gz

Step 4: Configure Nagios

Navigate to the extracted Nagios core directory:

cd ~/nagioscore-nagios-4.4.6/

Configure Nagios by executing the following command:

sudo ./configure --with-httpd-conf=/etc/apache2/sites-enabled

Step 5: Compile and Install Nagios

Compile and install Nagios by running the following commands:

sudo make all

sudo make install

sudo make install-init

sudo make install-commandmode

sudo make install-config

sudo make install-webconf

Step 6: Create a Nagios User Account

Create a Nagios user account and group using the following command:

sudo make install-users

Step 7: Configure Nagios Contacts

Edit the contacts.cfg file by running the following command:

sudo nano /usr/local/nagios/etc/objects/contacts.cfg

Add the email address of the person who will be notified in case of a problem:

define contact {
        contact_name                    nagiosadmin
        email                           [email protected]
        }

Save and close the file by pressing CTRL+X, then Y, and then ENTER.

Step 8: Verify Nagios Configuration

Verify the Nagios configuration by running:

sudo /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

Step 9: Restart Apache Service

Restart the Apache service to apply the changes by running:

sudo systemctl restart apache2

Step 10: Access Nagios Web Interface

Finally, access the Nagios web interface by entering the following URL in a web browser:

http://localhost/nagios/

Use the default login credentials, username "nagiosadmin" and password "nagiosadmin" to log in.

Congratulations! You have successfully installed Nagios on Elementary OS Latest.

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