Ubuntu :: Copy Files Via Command Line?

I'm looking for a way to copy files with a certain file extension over to another folder. For exampleSource Folder: /home/user/downloadsFile Type: *.epubDestination Folder: /home/user/epubs/The downloads folder has several folders that may go as deep as 2 or 3 levels.I tried this but it didn't seem to work (and I'm not really sure what to do to modify it to get it to work).Quote:find . -maxdepth 1 -type f -exec grep -q "pattern" '{}' ';' -exec cp '{}' /path/to/destination