1. Get the report application name from the concurrent program screen either from system admin responsibility or application developer responsibilities that is
Concurrent-->Program.
2. From concurrent program screen you can copy the executable name and go to executable screen
Concurrent-->Executable
You find the report .rdf file name in Execuation file name field.
3. Select basepath from fnd_application_vl where application_name=the application name you got it from step 1.
4. go to putty or any similar tool and run
cd $ basepath/reports/US and then pwd (Parent working Directory) which you got it from step 3.
5. Copy the path and open WICSCP or any similar tool .Double click the bar and paste it in open directory field.
6. Search for the rdf file you got it in step 2.
Good Luck
Anwar Aziz