Completed first part of Operating System Installation Ubuntu 12.04 64 bit minimal section
HA schema is improved to have a Virtualbox implementation section. Network is improved to be using two internal networks for service link and communication link. NAT link is also added
ha-schema: NAT link completedd. Added an optional Email client Virtual Machine
Operating System installation and all of its steps were written
Network setup chapter has begun to be improved so that network-setup meets new ha-schema
Network setup was improved with ports and better redaction