gadmin-openvpn-server software package provides GTK+ configuration tool for openvpn (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 gadmin-openvpn-server
gadmin-openvpn-server is installed in your system.
Make ensure the gadmin-openvpn-server package were installed using the commands given below,
$ sudo dpkg-query -l | grep gadmin-openvpn-server *
You will get with gadmin-openvpn-server package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Administration Utilities |
| Package | gadmin-openvpn-server |
| Version | 0.1.5-3.1 |
| Description | GTK+ configuration tool for openvpn (server) |
| Sub Section | admin |