libkgraphviewer2 software package provides GraphViz dot graph viewer - libs, 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 libkgraphviewer2
libkgraphviewer2 is installed in your system.
Make ensure the libkgraphviewer2 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libkgraphviewer2 *
You will get with libkgraphviewer2 package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Libraries |
| Package | libkgraphviewer2 |
| Version | 4:2.1.90-0ubuntu2 |
| Description | GraphViz dot graph viewer - libs |
| Sub Section | Libs |