https://www.howtoforge.com/tutorial/how-to-install-proxmox-ve-4-on-debian-8-jessie/

http://pve.proxmox.com/wiki/Install_Proxmox_VE_on_Debian_Jessie#Add_an_.2Fetc.2Fhosts_entry_for_your_IP_address

Install Proxmox VE 4 on Debian 8