The Maven Cookbook
10.8. Installing Nexus Professional
You need to download and install Nexus Professional to integrate your repository manager with enteprise security, manage the procurement of software artifacts, and track staged software releases.
To download and install Sonatype Nexus Professional, follow the instructions in Section 2.1.2, "Downloading Nexus Professional", and Section 2.2.3, "Installing Nexus Professional", from "Repository Management with Nexus".