命令行如下：
curl -I http://www.google.cn
HTTP/1.1 200 OK
Date: Fri, 04 Dec 2009 05:00:48 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html; charset=GB2312
Set-Cookie: PREF=ID=b967a5569e7612fe:NW=1:TM=1259902848:LM=1259902848:S=RzTnMbkx10_w1Fo3; expires=Sun, 04-Dec-2011 05:00:48 GMT; path=/; domain=.google.cn
Set-Cookie: NID=29=jSJmgVmzh8Tj9yXNQI_obR5bbG8wIOk2J_8A8fzeSTYuUalXTkC7vv8rZNAgcy2YAvZ0TaGnfrj3HlJMSP3i9qolrNNjSiwt2ZNQ-5vl9yOYGswZYq70c8MtBxr2Lw3c; expires=Sat, 05-Jun-2010 05:00:48 GMT; path=/; domain=.google.cn; HttpOnly
Server: gws
X-XSS-Protection: 0
Content-Length: 0
发现在其服务器名被修改为gws
curl -I http://www.baidu.com
HTTP/1.1 200 OK
Date: Fri, 04 Dec 2009 04:55:44 GMT
Server: BWS/1.0
Content-Length: 3520
Content-Type: text/html;charset=gb2312
Cache-Control: private
Expires: Fri, 04 Dec 2009 04:55:44 GMT
Set-Cookie: BAIDUID=C7BAC24E0E27D415B0EAD646371C4D5D:FG=1; expires=Fri, 04-Dec-39 04:55:44 GMT; path=/; domain=.baidu.com
P3P: CP=“ OTI DSP COR IVA OUR IND COM “
发现在其服务器名被修改为BWS
说明这两个网站都隐藏了其真实服务器类型
一般这个命令或者通过工具都可以查出网站对应服务器类型
如下：
curl -I http://www.itmop.com/
HTTP/1.1 200 OK
Date: Fri, 04 Dec 2009 04:54:11 GMT
Server: Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8l DAV/2 mod_auth_passthrough/2.1 frontpage/5.0.2.2635
Vary: Accept-Language,Cookie,Accept-Encoding
Content-Language: zh-cn
Content-Type: text/html; charset=utf-8
看得出来是用的Apache
经过网上查资源，了解百度和谷歌都是使用thttpd服务器
thttpd is a simple, small, portable, fast, and secure HTTP server.
