wget没有明显的原因

我有一个使用wget创建cron作业的问题。当我使用这个命令：wget没有明显的原因

wget -U http://example.com/wp-content/plugins/plugin_name/export.php

我得到这个消息：

--2013-11-21 11:29:01-- http://example.com/wp-content/plugins/plugin_name/export.php 
Resolving example.com... 255.255.255.255 
Connecting to example.com|255.255.255.255|:80... connected. 
HTTP request sent, awaiting response... 403 Forbidden 
2013-11-21 11:29:01 ERROR 403: Forbidden.#

于是我研究了这一点，并使用浏览器的欺骗伎俩像这样尝试：

wget -U 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.6) Gecko/20070802 SeaMonkey/1.1.4' http://example.com/wp-content/plugins/plugin_name/export.php

但这种回报：

--2013-11-21 11:36:02-- http://example.com/wp-content/plugins/plugin_name/export.php 
Resolving example.com... 255.255.255.255 
Connecting to example.com|255.255.255.255|:80... connected. 
HTTP request sent, awaiting response... 404 Not Found 
2013-11-21 11:36:03 ERROR 404: Not Found.

我找不到任何理由发生这种情况，我有点难住。我没有运行任何一种代理拦截

来源

2013-11-21 green green grass