I recently installed Tomcat 6 on Ubuntu 9.10 and when trying to stop the tomcat server, I was receiving an error.

I was issuing the statement

sudo ./shutdown.sh 

and received an error, including:

Catalina.stop: java.io.FileNotFoundException: /usr/share/tomcat6/conf/server.xml

To get around this, I used a different command to stop and start the server:

$ sudo service tomcat6 stop

$ sudo service tomcat6 start

Hope others find this useful.