Unixcop published a tutorial about installing OpenVAS.

Install OpenVAS – Open Vulnerability Assessment Scanner

OpenVAS is a full-featured vulnerability scanner. Its capabilities include unauthenticated and authenticated testing, various high-level and low-level internet and industrial protocols, performance tuning for large-scale scans and a powerful internal programming language to implement any type of vulnerability test.

The scanner obtains the tests for detecting vulnerabilities from a feed that has a long history and daily updates.

Install OpenVAS – Open Vulnerability Assessment Scanner - Unix / Linux the admins Tutorials