Delete Data Files

Hello,
I have recreated my undo tableapce with a single data file.
The previous data files of undo tablespace are still exists on the drive & allocating a LOT of drive space...
Can i delete the previous files . . . ?
I there any problem in deleting the files when db is up & running. . .?

To be sure rename these files first or move it to an
other location and check whether the DB still works.Yup it is safe to rename or move this file before deleting permanently.
Another way is run following command , it will show attached processes
if datafile is in use
fuser <data_file_name>
Virag

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