https://wiki.centos.org/HowTos/VNC-Server
https://www.youtube.com/watch?v=gzcPdAksKII
https://linuxconfig.org/configuring-vnc-server-access-on-a-redhat-linux
http://www.tecmint.com/oracle-database-11g-release-2-installation-in-linux/
http://www.tecmint.com/install-tightvnc-remote-desktop/