Hi all, This pdf contains step-by-step information with pictures on how to create a virtual disk space and install different Linux Distributions in Oracle VM Virtual Box, a free virtualization software that is very stable and robust. The Linux distributions I used during installation are Debian 8 (64bit) and Cent OS 6.4 (64bit). In creating this document, I have had in mind most especially the beginner, It will also prove useful to trainers, and advanced users as well. I hope every reader finds it useful.