knot software package provides authoritative domain name server, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install knot
knot is installed in your system.
Make ensure the knot package were installed using the commands given below,
$ sudo dpkg-query -l | grep knot *
You will get with knot package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Network |
| Package | knot |
| Version | 2.1.1-1build1 |
| Description | authoritative domain name server |
| Sub Section | Net |