In this blog article we will show you how to install Nessus Vulnerability Scanner on a CentOS VPS. Nessus is powerful, free and easy to use proprietary security scanner. Its plug-in architecture makes Nessus to be very customizable and allows users to customize it according to their needs. Nessus database is frequently updated and it makes is very efficient. According many surveys Nessus is the most popular vulnerability scanner in the world. Installing Nessus Vulnerability Scanner on CentOS is an easy task if you carefully follow our tutorial bellow.