Or the more secure "dd if=/dev/random of=/file/to/be/deleted count=$FILE_SIZE" which would prevent any undelete tool from working (Unless you have a COW-type file system and the file you want to delete is in the source image).
Or the more secure "dd if=/dev/random of=/file/to/be/deleted count=$FILE_SIZE" which would prevent any undelete tool from working (Unless you have a COW-type file system and the file you want to delete is in the source image).