Tips on how to add pages to the robots.txt file? I think I made a big mistake

[joecoles17]

So recently I downloaded the Cleanurls module that lets you get rid of the id number in your pages url, however I did not think about the effect that this would have on the google search engine. As now when I want to find specific pages on my website, google displays the old url that lead to a page that says ' This page is not available'.

 

Because this is the case, I want to add all of my old urls that have the id numbers in them to my robots.txt file so they will no longer show up in google search.

 

Is this possible?

 

And if so, what would be the code that I would add to block each specific page from google.

 

Thanks heaps!