Well, that was quite useless  Sorry, but there are several ways to recover files from the trash can. “Put Back” and the previous word “Restore” have been around for a very long time, so this is not new. But you can also just drag a file out of the trash and put it anywhere, including back to where it was as well. 

Now recovering from already emptied trash would have been a much better report. 

In the article there is a link for tools to recover files in empty trash bin:

Yep. I saw that. That is the article I wanted to read. Thanks. 

And to be clear, the original article I found useless, not that you posted it. Just want to be clear about that.  

No problem. The thing that caught my eye was recovering files in a empty bin. I always thought that they were not recoverable. Just before emptying the bin I always see this:

Like most Unix based systems, it does not mark a file in the directory as deleted and only recover the files blocks when needed, Unix systems mark the blocks as free immediately. This means that blocks of the file could be reused immediately, meaning the file is gone. 

I have used third party recover programs in the past with limited success. If you have deleted something you did not mean to, turn off the machine and stop using it until you get the recover software.  If the drive is internal, just installing the new software can trash files. One should also not recover files to the same physical drive that the deleted files live on as the could overwrite the file space you are trying to recover. 

So this is a job for time machine or some other trusted backup system as the best alternative to recover deleted and “erased”  files. 

File recovery is a Good discussion to have. 

could use carbonite to recover files.

Another good conversation is to get users to empty the trash in the first place! I have so many clients where they run out of disk space and their downloads and trash are massive!