nbdelete - proper usage

I see this technote on nbdelete usage, but it still is not clear:

http://www.symantec.com/business/support/index?page=content&id=HOWTO90369

What is the proper command to run when I want to clean up on a specific DataDomain device?

Running NBU 7.1.0.4 on Linux.

Any help is appreciated.

Thanks