ErpNext Setup (refrence https://github.com/frappe/bench)
apt-get install python-minimal
wget https://raw.githubusercontent.com/frappe/bench/master/playbooks/install.py
sudo python install.py --develop
cd frappe
bench new-site site1.local
bench get-app erpnext https://github.com/frappe/erpnext
bench --site site1.local install-app erpnext
bench start