nbd-client-udeb 1:3.18-1 (s390x binary) in ubuntu cosmic

 Network Block Device (NBD) is a client/server protocol that
 emulates a block device (such as a hard disk, a floppy, or a CD-ROM)
 over the network, thus giving the system the ability to swap over the
 network, or to use raw network disks pace for other purposes.
 .
 This package provides the client binary for NBD.
 .
 It is a minimal version meant for use in the installer only.