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There may a slight variation of commands for Centos/Red Hat or other Operating Systems. I will be using "ubuntu-18.04.3-live-server-amd64".

Official Installation Guide can be useful in case you need help. You've verified that your computer supports Virtualization and have already installed VirtualBox.This article assumes you have a Windows 10 Laptop or Desktop with 8 gig RAM and about 40 GB Hard Disk space available for your Linux Virtual Machines. Host machine is able to establish shell connection with virtual machines.Virtual machines are able to access internet to download patches or updates.Virtual machines have their own network to communicate with each other.I thought I will note down the steps and share with the community for beginners while I am working on creating this cluster. Well, there is lot of material available in bits and pieces but I couldn't find anything serving my purpose. I thought it would be straight forward and I will be able to find instruction on Google quite easy. Of course, I didn't have three physical boxes available at home along with required networking cables etc. I wanted to create three nodes cluster for some R&D.