linux（ubuntu10.04）系统安装jdk,tomcat常见问题

新手上路，求教！

jdk 版本：

root@ubuntu:~# java -version

java version "1.6.0_20"

OpenJDK Runtime Environment (IcedTea6 1.9.8) (6b20-1.9.8-0ubuntu1~10.04.1)

OpenJDK Client VM (build 19.0-b09, mixed mode, sharing)

tomcat版本：apache-tomcat-7.0.11

tomcat服务启动：

root@ubuntu:~# $sudo /home/programs/tomcat/apache-tomcat-7.0.11/bin/startup.sh

Using CATALINA_BASE: /home/programs/tomcat/apache-tomcat-7.0.11

Using CATALINA_HOME: /home/programs/tomcat/apache-tomcat-7.0.11

Using CATALINA_TMPDIR: /home/programs/tomcat/apache-tomcat-7.0.11/temp

Using JRE_HOME: /usr/java/jdk1.6.0_26

Using CLASSPATH: /home/programs/tomcat/apache-tomcat-7.0.11/bin/bootstrap.jar:/home/programs/tomcat/apache-tomcat-7.0.11/bin/tomcat-juli.jar

但是为什么在火狐上打不开http://localhost:8080