Fedora20 如何在80端口上启动tomcat？

[小灰狼]

Fedora20 下使用默认方式安装的tomcat，但是1024 以下端口不给启动，我用 root 帐号启动也说没有权限开启80端口
systemctl start tomcat


网上找的资料千篇一律，全部出自同一个人，说要用 iptable 进行端口转发
但是我想让 tomcat 直接在 80 端口上运行，怎么办？

[小灰狼]

tomcat 启动日志： 信息: Initializing ProtocolHandler ["http-bio-80"] 十一月 21, 2014 9:38:18 上午 org.apache.coyote.AbstractProtocol init 严重: Failed to initialize end point associated with ProtocolHandler ["http-bio-80"] java.net.BindException: 权限不够 <null>:80 at org.apache.tomcat.util.net.JIoEndpoint.bind(JIoEndpoint.java:410) at org.apache.tomcat.util.net.AbstractEndpoint.init(AbstractEndpoint.java:640) at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:434) at org.apache.coyote.http11.AbstractHttp11JsseProtocol.init(AbstractHttp11JsseProtocol.java:119) at org.apache.catalina.connector.Connector.initInternal(Connector.java:978) at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102) at org.apache.catalina.core.StandardService.initInternal(StandardService.java:559) at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102) at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:813) at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102) at org.apache.catalina.startup.Catalina.load(Catalina.java:638) at org.apache.catalina.startup.Catalina.load(Catalina.java:663) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:280) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:454)