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.
sudo apt-get update
sudo apt-get remove --purge airvision
wget http://dl.ubnt.com/firmwares/unifi-video/3.0.5/unifi-video_3.0.5~Debian7_amd64.deb
dpkg -i unifi-video_3.0.5~Debian7_amd64.deb