Using rbd-nbd tool in Ceph development cluster

Hi, I have to use this *rbd-nbd *tool from Ceph. This is part of Ceph source code. Here: https://github.com/ceph/ceph/tree/master/src/tools/rbd_nbd My question is: Can we use this *rbd-nbd* tool in the Ceph cluster? By Ceph cluster I mean the development cluster we build through *vstart.sh* script. I am quite sure we could use it. I have this script running. I can *start* and *stop* the cluster. But I am struggling to use this rbd-nbd tool in the development cluster which we build through vstart.sh script. Looking for help. Thanks.