I have tried several times to install ERPNext on ArchLinux - I have not yet succeede 100%. Specifically, @codingCoffee recommends NOT using archlinux for a production ERPNext machine.
I personally don’t like ubuntu, but debian is very stable and if you follow https://discuss.frappe.io/t/guide-manual-install-erpnext-on-ubuntu-16-xx-debian-v8-9/22596 you will be fine