Hum....
I rename the file with success but it is not what i was thinking....
Instead of renaming the original file this command creates a copy of the original with the new name but i still have the original on the directory.
e.g:
I have a directory with 1 file named test, after rename it my directory will have two files. The first one is the same (test) and a new one with the new name.
Is this the espected behavior?