How to activate Validity fingerprint reader VFS300 in Ubuntu

Validity fingerprint readers are present in a lot of business laptops. Dell Vostro series (3350, 3500) uses the Validity fingerprint readers. Until recently, 138a:0008 Validity Sensors, Inc. VFS300 Fingerprint Reader was not recognized by Ubuntu. A few improvements to the ongoing driver development has now made it possible to enable fingerprint reading for laptops using the VFS300 hardware. 
Please note:

i. Before you install this, please remove the fingerprint-gui ppa

   sudo ppa-purge  ppa:fingerprint/fingerprint-gui

ii. This has only been tested on amd64 system. We are awaiting packages for 32bit systems
iii. The program is still under development, so expect a few crashes and error reports
To install the driver for the fingerprint reader, follow the instructions below:

1. Add this PPA to your sources:
    sudo add-apt-repository ppa:fingerprint/fprint
  sudo apt-get update
  sudo apt-get upgrade

2. Download the libfprint package and Install the software packages:
sudo apt-get install libfprint0 fprint-demo libpam-fprintd gksu-polkit

sudo dpkg -i libfprint0_0.4.0+git20120202-0ppa1~precise2_amd64.deb
3. Log out and then log back in
4. Open “Users and Accounts” and then click fingerprint to register your fingerprint
See the screenshots below on how to register your fingerprint.

Thanks to Ochir for the instructions and package

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