fceux software package provides all-in-one NES/Famicom Emulator, 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 fceux
fceux is installed in your system.
Make ensure the fceux package were installed using the commands given below,
$ sudo dpkg-query -l | grep fceux *
You will get with fceux package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Other OSs and file systems |
| Package | fceux |
| Version | 2.2.2+dfsg0-1build1 |
| Description | all-in-one NES/Famicom Emulator |
| Sub Section | otherosfs |