Web site owner hide their webpages using commands in Robots.txt.Robots.txt is a text file which is located in the root directory of a site.It is used to control webpages indexed by a robot,ie. you can disallow a particular web page or content to be spidered from search engine robots. By using ‘disallow‘ word you can block any URL of your blog from reaching search engines.
We will take the help of Robots.text file to see the hidden web site pages and content
Step 1 – Go to Google and type this in the search box
"robots.txt" "disallow:" filetype:txt
Hit enter and you will be presented with loads of Robots file website results which have a disallow command.
Step 2 – From thousands of results we will choose any website,for example I will open Microsoft robot text file which is in the 1st page (Highlighted).After opening the robot text file,it looks like this
These are the content and pages which Microsoft doesn’t want search engine spider to get indexed.Now copy any line after the word Disallow:
For example we will copy this line :
/communities/blogs/PortalResults.mspx
Remember to copy the slash which is at the beginning of the line.
Step 3 - Type the main website url and then the line which you have copied in the Step 2 
After combining both the main website URL and the line,Hit enter (See the screenshot)
Main url - http://microsoft.com
Line - /communities/blogs/PortalResults.mspx
Combination - http://www.microsoft.com/communities/blogs/PortalResults.mspx
This was the page Microsoft had hidden from the search engine!
This was just an example,you can find some more interesting web pages and other secret content easily.Go ahead and try !
June 17th, 2008 at 4:44 pm
Great Post.
crenk.com
June 17th, 2008 at 5:45 pm
funny result using your tip on google. http://www.google.gr/linux never seen that page
nice tip
June 17th, 2008 at 5:49 pm
A great way to find articles and web site web pages which are hidden from search engine…
June 18th, 2008 at 7:41 am
WOW.. this is so cool.. easy to find the hidden files from search engines..
June 19th, 2008 at 9:32 am
Hey this is cool feature, but I think that google should prevent it. Sometimes it may contain sensitive information!
But anyway, great post and I will be careful about it on my pages.
June 19th, 2008 at 12:57 pm
Sensitive information shouldn’t be on the internet! Companies have a responsibility to keep their data safe. There’s a new story about data beig lost or stolen every week!