OpenNebula is an Open Source Management tool that helps Virtualized Data Centers oversee private clouds, public clouds and hybrid clouds. OpenNebula combines existing virtualization technologies with advanced features for multi-tenancy, automated provisioning and elasticity. Installing OpenNebula Front-end on Ubuntu 18.04 I assume that you already have a running instance of this operating systems, this can be a virtual machine or a physical server. Note: Until the Installation Completes Don't change any passwords while installing. Proceed with the Passwords which I given. Step 1: Install and Configure MySQL Database (Skip the Step if already Maria DB Installed in Your Machine) The MySQL/MariaDB back-end is an alternative to the default SQLite back-end. The two back-ends cannot coexist (SQLite and MySQL), and you will have to decide which one is going to be used while planning your OpenNebula installation. Uninstalling Current Version of MariaDB server: $ sudo a...