prism2-usb-firmware-installer software package provides firmware files for the prism2_usb kernel driver, 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 prism2-usb-firmware-installer
prism2-usb-firmware-installer is installed in your system.
Make ensure the prism2-usb-firmware-installer package were installed using the commands given below,
$ sudo dpkg-query -l | grep prism2-usb-firmware-installer *
You will get with prism2-usb-firmware-installer package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Administration Utilities |
| Package | prism2-usb-firmware-installer |
| Version | 0.2.9+dfsg-5 |
| Description | firmware files for the prism2_usb kernel driver |
| Sub Section | Admin |