How to Install LibreNMS on Elementary OS

LibreNMS is a free and open-source network monitoring tool that can monitor a wide variety of devices and networks. In this tutorial, we'll guide you through the steps to install LibreNMS on Elementary OS.

Prerequisites

Before we begin, ensure that your system meets the following requirements:

Step 1: Install Dependencies

Open the Terminal on your Elementary OS system and update the package repository:

sudo apt update && sudo apt upgrade

Next, install Git, PHP, PHP extensions, and the SNMP and Fping packages:

sudo apt install git php php-{{VERSION}} php-{{VERSION}}-mysql php-{{VERSION}}-mbstring php-{{VERSION}}-common php-{{VERSION}}-json php-{{VERSION}}-xml php-{{VERSION}}-gd php-{{VERSION}}-zip snmp fping composer

In the above command, replace {{VERSION}} with your installed PHP version. For example, if you have installed PHP 7.4, then replace {{VERSION}} with 7.4.

Step 2: Install and Configure the Web Server

You can choose any web server for your LibreNMS installation. In this tutorial, we'll use Apache as the web server.

Install Apache using the following command:

sudo apt install apache2

Next, start the Apache service and enable it to automatically start during system boot:

sudo systemctl start apache2
sudo systemctl enable apache2

Step 3: Download and Install LibreNMS

First, navigate to the /var/www/ directory and clone the LibreNMS repository:

cd /var/www/
git clone https://github.com/librenms/librenms.git librenms

Next, change the ownership of the /var/www/librenms directory to the web server user and group:

sudo chown -R www-data:www-data /var/www/librenms/

After that, navigate to the LibreNMS directory and run the installer:

cd /var/www/librenms/
sudo ./scripts/composer_wrapper.php install --no-dev

During the installation process, you'll be prompted to provide some details such as the name of the database user and password. Fill in the details and complete the installation process.

Once the installation is complete, generate an application key for the LibreNMS installation:

php /var/www/librenms/build/app_key.php

Step 4: Configure the Firewall

By default, the firewall on an Elementary OS system is inactive. However, if you have enabled it, then you need to allow incoming traffic on the HTTP and HTTPS ports (80 and 443) to access the LibreNMS web interface.

Execute the following commands to allow incoming traffic on these ports:

sudo ufw allow 80/tcp
sudo ufw allow 443/tcp

Step 5: Access the LibreNMS Web Interface

Once you've configured the firewall, you can access the LibreNMS web interface by opening a web browser and entering your server's IP address or domain name followed by /librenms in the URL bar.

http://[server_IP_address]/librenms

You'll be redirected to the LibreNMS login page. Enter the default login credentials:

After logging in, you can configure LibreNMS to monitor your network devices and servers.

Conclusion

In this tutorial, we covered the steps to install LibreNMS on an Elementary OS machine. To make the most of the functionalities of this powerful tool, you can explore its documentation and additional features.

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