How do I install ERPNext

hii sir i want to do fresh installation pls provide me commands with prerequisite

Follow the instructions here: bench/ at master · frappe/bench · GitHub

You can also look at this one

Just Install Ubuntu 14.X or 16.X and follow the instruction

sudo apt-get update
sudo adduser frappe
sudo usermod -aG sudo frappe
su - frappe
sudo python --production