How to upgrade Ubiquiti Airvision NVR from 2.x to UniFi Video 3.0.5?

[Adventech]

PROBLEM:
How to upgrade Ubiquiti Airvision NVR from 2.x to UniFi Video 3.0.5?
Upgrade Firmware and Linux Debian OS on Ubiquiti NVR.

SOLUTION:
1.) Download and Run Putty.
Run Once: http://the.earth.li/~sgtatham/putty/latest/x86/putty.exe
Install: http://the.earth.li/~sgtatham/putty/latest/x86/putty-0.63-installer.exe

2.) Connect to NVR's IP address using SSH.

3.) Login using either the Default Username and Password or root and the password you created at setup.
Default: Username: root    Password: ubnt

4.) Run the following commands in order.

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sudo apt-get update

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sudo apt-get remove --purge airvision

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wget http://dl.ubnt.com/firmwares/unifi-video/3.0.5/unifi-video_3.0.5~Debian7_amd64.deb


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dpkg -i unifi-video_3.0.5~Debian7_amd64.deb