Ubuntu 9.10 啟動 tomcat6 - Linux

以下是錯誤訊息：
$ sudo ./startup.sh
Using CATALINA_BASE: /usr/share/tomcat6
Using CATALINA_HOME: /usr/share/tomcat6
Using CATALINA_TMPDIR: /usr/share/tomcat6/temp
Using JRE_HOME: /usr

$ sudo ./shutdown.sh
Using CATALINA_BASE: /usr/share/tomcat6
Using CATALINA_HOME: /usr/share/tomcat6
Using CATALINA_TMPDIR: /usr/share/tomcat6/temp
Using JRE_HOME: /usr
2010/2/18 下午 09:58:29 org.apache.catalina.startup.Catalina stopServer
嚴重的: Catalina.stop:
java.io.FileNotFoundException: /usr/share/tomcat6/conf/server.xml (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:106)
at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:407)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:337)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:415)

$ echo $JRE_HOME
/usr/lib/jvm/java-6-sun/jre

不知道為什麼Using JRE_HOME那裡都跳不出我設的路徑，而都是/usr，
但是不用sudo時顯示路徑是正常的。

第一次裝，所以上來請教一下大家，謝謝^^

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