nbdkit software package provides toolkit for creating NBD servers, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install nbdkit
nbdkit is installed in your system.
Make ensure the nbdkit package were installed using the commands given below,
$ sudo dpkg-query -l | grep nbdkit *
You will get with nbdkit package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Administration Utilities |
| Package | nbdkit |
| Version | 1.1.3-2 |
| Description | toolkit for creating NBD servers |
| Sub Section | Admin |