How do I enable Server Side Includes (SSI) ?

Two things have to be done for tomcat to acknowledge SSI scripts :

1. Rename $CATALINA_BASE/server/lib/servlets-ssi.renametojar to $CATALINA_BASE/server/lib/servlets-ssi.jar

2. Uncomment the section of web.xml found in $CATALINA_BASE/conf/web.xml that deals with SSI. 

It looks like this when it is uncommented

  <servlet>

     <servlet-name>ssi</servlet-name>

     <servlet-class>org.apache.catalina.ssi.SSIServlet</servlet-class>

     <init-param>

           <param-name>buffered</param-name>

           <param-value>1</param-value>

     </init-param>

     <init-param>

           <param-name>debug</param-name>

           <param-value>0</param-value>

     </init-param>

     <init-param>

           <param-name>expires</param-name>

           <param-value>666</param-value>

     </init-param>

     <init-param>

           <param-name>isVirtualWebappRelative</param-name>

           <param-value>0</param-value>

     </init-param>

     <load-on-startup>4</load-on-startup>

  </servlet>