libgksu2-dev software package provides library providing su and sudo functionality (development 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 libgksu2-dev
libgksu2-dev is installed in your system.
Make ensure the libgksu2-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libgksu2-dev *
You will get with libgksu2-dev package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Library development |
| Package | libgksu2-dev |
| Version | 2.0.13~pre1-6ubuntu8 |
| Description | library providing su and sudo functionality (development files) |
| Sub Section | Devel |