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Robots Exclusion Standard – Wikipedia

https://de.wikipedia.org/wiki/Robots_Exclusion_Standard
Nach der Übereinkunft des Robots-Exclusion-Standard-Protokolls liest ein Webcrawler (Robot) beim Auffinden einer Webseite zuerst die Datei robots.txt (kleingeschrieben) im …
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Test your robots.txt with the robots.txt Tester - …

https://support.google.com/webmasters/answer/6062598?hl=en
The robots.txt Tester tool shows you whether your robots.txt file blocks Google web crawlers from specific URLs on your site. For example, you can use this tool to test whether the Googlebot-Image crawler can crawl the URL of an image you wish to block from Google Image Search.
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Robots.txt Analyzer - SEO Book

http://tools.seobook.com/robots-txt/analyzer/
Analyze your robots.txt file to help ensure Google and other search engines are crawling and indexing your site properly.
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robots协议_百度百科 - baike.baidu.com

https://baike.baidu.com/item/Robots%E5%8D%8F%E8%AE%AE/2483797
robots协议也叫robots.txt(统一小写)是一种存放于网站根目录下的ASCII编码的文本文件,它通常告诉网络搜索引擎的漫游器(又称网络蜘蛛),此网站中的哪些内容是不应被搜索引擎的漫游器获取的,哪些是可以被漫游器获取的。因为一些系统中的URL是大小写敏感 ...
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