1. Tomcat6 (Web server) installation.

Run the following command to install Apache Tomcat6 if your server does not exist Tomcat6 yet.
sudo apt-get install tomcat6
Note: Remember to set tomcat timezone to be in UTC which used for solr index
update
Todo that, open usr/shared/tomcat6/bin/catalina.sh and around line 86 add the
following 2 lines:
CATALINA_OPTS=-Duser.timezone=UTC
JAVA_OPTS=-Duser.timezone=UTC