iwidgets4 software package provides [incr Widgets] Tk-based widget collection - run-time files, 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 iwidgets4
iwidgets4 is installed in your system.
Make ensure the iwidgets4 package were installed using the commands given below,
$ sudo dpkg-query -l | grep iwidgets4 *
You will get with iwidgets4 package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Libraries |
| Package | iwidgets4 |
| Version | 4.0.1-6 |
| Description | [incr Widgets] Tk-based widget collection - run-time files |
| Sub Section | Libs |