Install Nexus 1.8.0.1 on Tomcat 6

I installed on a Mac OS X server with Snow Leopard, but this applies to any Tomcat 6 installation. As discussed here, here, and lots of other places across the interwebs - the latest release of Nexus can't read its own plexus.properties under Tomcat 6. Rather than disabling the Tomcat Security Manager as a workaround, I recommend setting the applicable properties through system properties at startup. Just add something like the following to your tomcat's bin/setenv.sh script-Dplexus.nexus-work=/opt/sonatype-work/nexus