linux下tomcat端口被占用

严重: Error starting endpoint
java.net.BindException: Address already in use:80
        at org.apache.tomcat.util.net.PoolTcpEndpoint.initEndpoint(PoolTcpEndpoint.java:264)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.startEndpoint(PoolTcpEndpoint.java:281)
        at org.apache.coyote.http11.Http11Protocol.start(Http11Protocol.java:171)
        at org.apache.coyote.tomcat5.CoyoteConnector.start(CoyoteConnector.java:1527)
        at org.apache.catalina.core.StandardService.start(StandardService.java:489)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:2313)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
        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:585)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)
2007-1-17 11:23:49 org.apache.catalina.startup.Catalina start
严重: Catalina.start:
LifecycleException:  Protocol handler start failed: java.net.BindException: Address already in use:80
        at org.apache.coyote.tomcat5.CoyoteConnector.start(CoyoteConnector.java:1529)
        at org.apache.catalina.core.StandardService.start(StandardService.java:489)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:2313)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
        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:585)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)
2007-1-17 11:23:49 org.apache.catalina.startup.Catalina start
信息: Server startup in 4704 ms

这是tomcat启动的时候报出的异常!!!

默认的是端口改为了80,原来装有oracle (oracle有个组件占用的是80端口), 后来给卸掉了,还是出现这个问题!!!
第一次启动tomcat是好的 可是第二次启动就会报这个异常 ./shutdown.sh ./startup.sh后就会出现这个异常!!!
重新启动linux (reboot命令)  后 变为正常 而且监控端口 80已经是打开的！！各位大大能不能帮我分析分析!!
linux上只装了 jdk,mysql,tomcat其他的应用软件都没装!!!

我在server.xml改为8080端口后 用域名访问不了 www.3000ep.com(用80的OK)