vim /etc/apt/sources.list.d/backports.list
deb http://http.debian.net/debian wheezy-backports main
apt-get purge lxc-docker*
apt-get purge docker.io*
apt-get update
apt-get install apt-transport-https ca-certificates
apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
deb http://http.debian.net/debian wheezy-backports main
apt-get purge lxc-docker*
apt-get purge docker.io*
apt-get update
apt-get install apt-transport-https ca-certificates
apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D