WHAT IS A VIRTUAL MACHINE?
A virtual machine is a software or a virtual environment that provides the same functionality as physical computers (eg, a computer system with its own CPU, memory, network interfaces, and storage capacity). A virtual machine is used to run software or OS like a physical computer.
Process of installing a virtual machine
The process of installing a virtual machine is straightforward; you only need to follow the following steps:
Install VirtualBox (or VMware Player).
Download an ISO image of any Linux distribution.
Open up VirtualBox and begin the installation process.