Tomcat 7没有在ubuntu 12.04上运行

Question

我安装了tomcat7，但是一旦我尝试使用我的默认浏览器（firefox）登录(http://localhost:8080)，它就无法工作了。

Unable to connect
Firefox can't establish a connection to the server at `(http://localhost:8080)`.

虽然当我从终端#sh startup.sh启动时，我得到了正确的消息：

Using CATALINA_BASE:   /usr/local/tomcat7
Using CATALINA_HOME:   /usr/local/tomcat7
Using CATALINA_TMPDIR: /usr/local/tomcat7/temp
Using JRE_HOME:        /usr/local/jdk1.6.0_23/jre
Using CLASSPATH:       /usr/local/tomcat7/bin/bootstrap.jar:/usr/local/tomcat7/bin/tomcat-juli.jar

Tomcat started.