title: Tomcat multiple instances simultaneously
body: <p>I am trying to run multiple instances of Tomcat, but even after configuring different ports for listening and shutting down the second instance, it keeps trying to listen on 8080 (configured for 8081). I read that I have to set a different value for <code>CATALINA_BASE</code>. From all the articles there are online, none of them actually show in which file this variable can be set.</p>
  
  <p>Where and how can I set CATALINA_BASE for my Tomcat instance in <code>C:\apache-tomcat-7.0.39</code></p>