title: Change $home for tomcat only?
body: <p>I have two instances of tomcat that run under the same user in a test/dev environment. In each instance there is an application that writes configuration data to the same directory in the $home of the user that runs tomcat.</p>
  
  <p>I'd like to set one instance of tomcat so that it thinks $home is somewhere else. Is this possible? If I do export home=foo/bar when I run one instance, will that affect the other instance?</p>
  
  <p>Obviously I know that I can run each instance as a different user, I do not want to do that in this case.</p>