1. Access to Github - http://github.com
  2. Linux: `sudo apt-get install git`
rm  /etc/apt/apt.conf /etc/apt/sources.list
cp /etc/apt/apt.conf.old  /etc/apt/apt.conf
cp /etc/apt/sources.list.old /etc/apt/sources.list
apt-get update && apt-get upgrade && apt-get dist-upgrade && poweroff