devstack installation troubleshooting

error on pip installation When install openstack on ubuntu using devstack, ./stack.sh always got error on install_pip stage, + cd /home/vagrant/devstack + source /home/vagrant/devstack/stackrc /home/vagrant/devstack/tools/install_pip.sh: 21: /home/vagrant/devstack/tools/install_pip.sh: source: not found as remedy, install pip before stack.sh wget https://bootstrap.pypa.io/get-pip.py sudo python get-pip.py error on git clone [ERROR] /home/vagrant/devstack/functions-common:598 git call failed: …