Automated Installation
Observium has an automated install script for use on Ubuntu and Debian systems. Using the automated installation script is as easy as downloading it, running it and answering a few simple questions, start with:
wget http://www.observium.org/observium_installscript.sh chmod +x observium_installscript.sh ./observium_installscript.sh
You may need to install wget on bare installations
apt install wget
For manual installation you may read the link below-
https://docs.observium.org/install_debian/#manual-installation