Version 1
Debian installed as VM. Single Struts app, just to test the install process.
apt-get update && apt-get -y upgrade
apt-get install tomcat8 maven
cd to project directory
Build WAR file:
mvn war:war
Copy target/vulnerable-struts.war to /var/lib/tomcat8/webapps/
Restart tomcat.
Browse to ip:8080/vulnerable-struts/index.action
Hack.