checkbox-qt software package provides QT4 interface for checkbox (transitional package), 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 checkbox-qt
checkbox-qt is installed in your system.
Make ensure the checkbox-qt package were installed using the commands given below,
$ sudo dpkg-query -l | grep checkbox-qt *
You will get with checkbox-qt package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Old Libraries |
| Package | checkbox-qt |
| Version | 1.2.4-0ubuntu1 |
| Description | QT4 interface for checkbox (transitional package) |
| Sub Section | Oldlibs |