ubuntu-12.04-LTS-install-docker

sudo su - 

# Kernels older than 3.10 lack some of the features required to run Docker containers.
uname -r
3.11.0-15-generic

apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D

echo deb https://apt.dockerproject.org/repo ubuntu-trusty main > /etc/apt/sources.list.d/docker.list

apt-get update

apt-get purge lxc-docker

usermod -aG docker ubuntu

apt-cache policy docker-engine

apt-get install -y linux-image-extra-$(uname -r)

apt-get install -y docker-engine

Here is the proper way to get latest docker engine (17 as of writing) on 12.04:

apt-key adv --keyserver hkp://pgp.mit.edu:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
sh -c "echo deb https://apt.dockerproject.org/repo ubuntu-precise main \
> /etc/apt/sources.list.d/docker.list"
apt-get purge lxc-docker
apt-get update
apt-get install docker-engine

@abale Your way done perfectly, thank you :)

Thank you guys

Here is the proper way to get latest docker engine (17 as of writing) on 12.04:

apt-key adv --keyserver hkp://pgp.mit.edu:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
sh -c "echo deb https://apt.dockerproject.org/repo ubuntu-precise main \
> /etc/apt/sources.list.d/docker.list"
apt-get purge lxc-docker
apt-get update
apt-get install docker-engine

👍

This worked for me:

sh -c "echo deb https://apt.dockerproject.org/repo ubuntu-precise main > /etc/apt/sources.list.d/docker.list"
curl -fsSL https://yum.dockerproject.org/gpg | apt-key add -
apt-get update && apt-get -y install docker-engine