在进行在线搜索时，很容易得到比你需要或想要的更多的结果，但是如果你真的想限制搜索的参数，你该怎么做（或使用）？今天的超级用户问答帖子给出了一位困惑读者求助的答案。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

问题

超级用户读者Ayu**an需要帮助来使用一组特定的标准进行谷歌搜索：

Is it possible to conduct a Google search with the following criteria:

• Criteria 1: Look through all sites that are ftp://
• Criteria 2: The file type should be PDF
• Criteria 3: The file should have ****ysis in the name, such as Digital Analysis Process.pdf

I have even tried using Google’s Advanced Search page. Please note that I was able to understand how to provide a specific name and file type, but not the protocol to search for ‘ftp:// specific’ sites.

Ayu**an需要使用什么协议将ftp://添加到他的搜索条件中？

答案

超级用户贡献者jjk\u charles和Nir为我们提供了答案。首先，查理斯：

You can use the term below to search for ****ysis and PDF in ftp servers only:

• ****ysis + “.pdf” inurl:ftp -inurl:(http|https)

Simply use this search term in Google’s search box rather than using the Advanced Search page.

Note: The key here is the use of inurl:ftp -inurl:(http|https), which will ignore any results from http/https websites. Change the remainder of the search string as you normally would to suit your needs.

接下来是Nir的答案：

To search for an ftp website, you use inurl:ftp -inurl:(http|https). It means you search for a website with ftp in its URL and the minus (-) removes the results with http/https in the URL so that you receive just the ftp results.

To search for a specific file type, you use filetype:pdf. To limit the search to a specific word in the title, you use intitle:****ysis or intext:****ysis.

Basically, your query needs to look like this:

• inurl:ftp -inurl:(http|https) filetype:pdf intitle:****ysis

Hope this helps. You can learn more about searching with Google at the following website:

Inside Search – Search Education Online

如果你还没有尝试过，但是真的想增加你的googlefu，那么上面链接的在线课程是一个很好的资源，可以为你的Google搜索提供动力！

有什么要补充的解释吗？在评论中发出声音。想从其他精通技术的Stack Exchange用户那里了解更多答案吗？在这里查看完整的讨论主题。