fgrun software package provides graphical frontend for running FlightGear, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install fgrun
fgrun is installed in your system.
Make ensure the fgrun package were installed using the commands given below,
$ sudo dpkg-query -l | grep fgrun *
You will get with fgrun package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Games |
| Package | fgrun |
| Version | 3.0.0-1 |
| Description | graphical frontend for running FlightGear |
| Sub Section | Games |