fat-modules-4.4.0-21-generic-l software package provides FAT filesystem support, 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 fat-modules-4.4.0-21-generic-l
fat-modules-4.4.0-21-generic-l is installed in your system.
Make ensure the fat-modules-4.4.0-21-generic-l package were installed using the commands given below,
$ sudo dpkg-query -l | grep fat-modules-4.4.0-21-generic-l*
You will get with fat-modules-4.4.0-21-generic-l package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | debian-installer udeb packages |
| Package | fat-modules-4.4.0-21-generic-l |
| Version | 4.4.0-21.37 |
| Description | FAT filesystem support |
| Sub Section | Debian-installer |