playground some git commands
sudo apt-key adv
--keyserver hkp://ha.pool.sks-keyservers.net:80
--recv-keys 58118E89F3A912897C070ADBF76221572C52609D
test2
deb https://apt.dockerproject.org/repo ubuntu-xenial main
echo "deb https://apt.dockerproject.org/repo ubuntu-xenial main" | sudo tee /etc/apt/sources.list.d/docker.list
Acquire::https::proxy "https://195.87.49.10:8080/";
sudo apt-get install linux-image-extra-$(uname -r) linux-image-extra-virtual
curl -L https://github.com/docker/machine/releases/download/v0.9.0-rc2/docker-machine-`uname -s-uname -m` >/tmp/docker-machine &&
chmod +x /tmp/docker-machine &&
sudo cp /tmp/docker-machine /usr/local/bin/docker-machine
curl -L https://github.com/docker/machine/releases/download/v0.2.0/docker-machine_darwin-amd64 > /usr/local/bin/docker-machine chmod +x /usr/local/bin/docker-machine