To follow this tutorial, you should use a sudo user.
Resource Requirements: A Droplet with 2 GB RAM. The commands, packages, and files shown in this tutorial were tested on a minimal installation of CentOS 7. We will then test their connectivity to the remote desktop, and finally, learn how to secure the remote connection through an SSH tunnel. We will create two user accounts and configure VNC access for them. To demonstrate how VNC works, we will also install the GNOME desktop on your CentOS server. We will install the TigerVNC server which is freely available from the TigerVNC GitHub repository. In this tutorial we will learn how to install and configure a VNC server on CentOS 7. Like everything else in the networking world, VNC is based on the client server model: VNC server runs on a remote computer - your Droplet - which serves incoming client requests. If you come from a Microsoft Windows server background, VNC is much like the Remote Desktop Service, except it’s also available for OS X, Linux, and other operating systems. 
VNC also allows clipboard sharing between both computers. It’s like remote controlling an application: the client computer’s keystrokes or mouse clicks are transmitted over the network to the remote computer. VNC or Virtual Network Computing is a platform-independent protocol that enables users to connect to a remote computer system and use its resources from a Graphical User Interface (GUI).
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