Ref:http://community.polarion.org/help/index.jsp?topic=/com.polarion.xray.doc.user/install_linux.html
This section covers installation and startup procedures for Linux. There is also some information about initial configuration of Polarion on Linux, as well as reference information about the Polarion installation structure and third-party components.
 
 
Update vs. New Installation
The current version 2.6.5 can be used for a fresh installation or as an update for version 2.6.0. If you are running a version older than 2.6.0, you cannot upgrade to 2.6.5 directly. It is recommended that you first upgrade to 2.6.0, and …

referance:  http://www.meritonlinesystems.com/docs/apache_tomcat_redhat.html
1.0 Introduction
Java servlets are a powerful tool for building websites and web based applications. One skill that every Java web developer should have is the ability to install and configure the Tomcat servlet engine. Many thanks to the Apache Software Foundation for providing this mature, stable, open source software. It was recently voted the Best Application Server of 2003 by InfoWorld readers.
This article discusses how to integrate Tomcat with the Apache web server on Red Hat Linux 9 or …