Recovering a file ?!

[Matrix]

Hello there,

I wonder, please, if you can show me how to recover a removed file 
(using rm command_line). As it writed in the rm_man :

"Note that if you use rm to remove a file, it  is  usually  possible to 
_recover the contents of that file_.  If you want more assurance that 
the contents are truly unrecoverable, consider using shred."

Thanks a lot sir,

nextriemann