LibreNMS is a free, open-source network monitoring system that helps network administrators keep track of their devices and applications. If you are running Linux Mint and want to install LibreNMS, this tutorial is for you.
Before we get started, make sure your system meets the following prerequisites:
LibreNMS requires several packages to run correctly. Use the following command to install them all:
sudo apt-get update
sudo apt-get install apache2 composer fping git graphviz imagemagick libapache2-mod-php7.4 mariadb-client mariadb-server mtr-tiny nmap php7.4-cli php7.4-curl php7.4-gd php7.4-json php7.4-mbstring php7.4-mysql php7.4-snmp php7.4-xml php7.4-zip python-memcache python-mysqldb python3-memcache python3-mysqldb rrdtool snmp snmpd whois
MySQL is used by LibreNMS to store data. We need to create a new database and a user account that LibreNMS can use to access it:
sudo mysql -u root
CREATE DATABASE librenms CHARACTER SET utf8 COLLATE utf8_general_ci;
CREATE USER 'librenms'@'localhost' IDENTIFIED BY '<password>';
GRANT ALL PRIVILEGES ON librenms.* TO 'librenms'@'localhost';
FLUSH PRIVILEGES;
exit
Replace <password> with a strong password of your choice.
Clone the LibreNMS repository from GitHub:
sudo mkdir -p /opt/librenms
sudo chown <user>:<group> /opt/librenms
cd /opt
git clone https://github.com/librenms/librenms.git
cd librenms
Replace <user> and <group> with the appropriate values for your system. For example, if your user and group are both "ubuntu", use "ubuntu:ubuntu".
Run the following commands to install LibreNMS:
./scripts/composer_wrapper.php install --no-dev
./build-snmp-cache.php
Create a new Apache virtual host configuration file for LibreNMS:
sudo nano /etc/apache2/sites-available/librenms.conf
Add the following content to the file:
<VirtualHost *:80>
DocumentRoot /opt/librenms/html/
ServerName your-server-name-or-ip
CustomLog /opt/librenms/logs/access_log combined
ErrorLog /opt/librenms/logs/error_log
AllowEncodedSlashes NoDecode <Directory "/opt/librenms/html/"> Require all granted AllowOverride All Options FollowSymLinks MultiViews </Directory> </VirtualHost>
Replace your-server-name-or-ip with your server name or IP address.
Enable the new Apache virtual host and restart Apache:
sudo a2ensite librenms.conf
sudo systemctl restart apache2
Copy the sample configuration file and edit it:
cd /opt/librenms
sudo cp config.php.default config.php
sudo nano config.php
Modify the following lines in the file:
$config['db_host'] = 'localhost';
$config['db_name'] = 'librenms';
$config['db_user'] = 'librenms';
$config['db_pass'] = '<password>';
$config['base_url'] = 'http://your-server-name-or-ip';
Replace <password> with the password you set in step 2, and http://your-server-name-or-ip with your server name or IP address.
LibreNMS can monitor various types of devices, such as routers, switches, servers, etc. To add a device, use the addhost.php script:
cd /opt/librenms
sudo php addhost.php your-device-ip community v2c
Replace your-device-ip with the IP address of the device you want to monitor, and community and v2c with the SNMP community and version used by the device.
Open a web browser and go to http://your-server-name-or-ip. You should see the LibreNMS login page. Use the default credentials to log in:
librenmslibrenmsYou should now be able to access the LibreNMS web interface and start monitoring your network devices.
In this tutorial, we have shown you how to install LibreNMS on Linux Mint and start monitoring your network devices. LibreNMS is a powerful and versatile tool that can help you keep track of your network infrastructure and troubleshoot issues quickly and efficiently.
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