Default - All Robots are:	Allowed Refused
Crawl-Delay:	Default - No Delay 5 Seconds 10 Seconds 20 Seconds 60 seconds 120 Seconds
Sitemap: (leave blank if you don't have)
Search Robots:	Google	Same as Default Allowed Refused
	Google Image	Same as Default Allowed Refused
	Google Mobile	Same as Default Allowed Refused
	MSN Search	Same as Default Allowed Refused
	Yahoo	Same as Default Allowed Refused
	Yahoo MM	Same as Default Allowed Refused
	Yahoo Blogs	Same as Default Allowed Refused
	Ask/Teoma	Same as Default Allowed Refused
	GigaBlast	Same as Default Allowed Refused
	DMOZ Checker	Same as Default Allowed Refused
	Nutch	Same as Default Allowed Refused
	Alexa/Wayback	Same as Default Allowed Refused
	Baidu	Same as Default Allowed Refused
	Naver	Same as Default Allowed Refused
	MSN PicSearch	Same as Default Allowed Refused
Restricted Directories:	The path is relative to root and must contain a trailing slash "/"

Now, Create 'robots.txt' file at your root directory. Copy above text and paste into the text file.

About Robots.txt Generator

Robots.txt is a file that contains instructions on how to crawl a website. It is also known as robots exclusion protocol, and this standard is used by sites to tell the bots which part of their website needs indexing. Also, you can specify which areas you don’t want to get processed by these crawlers; such areas contain duplicate content or are under development.