gnome-screensaver-flags software package provides Screensaver for GNOME with flags of the world., 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 gnome-screensaver-flags
gnome-screensaver-flags is installed in your system.
Make ensure the gnome-screensaver-flags package were installed using the commands given below,
$ sudo dpkg-query -l | grep gnome-screensaver-flags *
You will get with gnome-screensaver-flags package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | GNOME |
| Package | gnome-screensaver-flags |
| Version | 0.1-1 |
| Description | Screensaver for GNOME with flags of the world. |
| Sub Section | GNOME |