2.1 Install Generic Server or PC
2.1.1 Prepare Installation Media
2.1.2 Instructions for GNU/Linux or Unix
If you usb flash drive is /dev/sdc
# dd bs=1M if=./proxmox-ve_*.iso of=/dev/sdc
# sync
2.1.3 Instructions for Windows
Using Etcher
Etcher works out of the box. Download Etcher from https://etcher.io. It will guide you through the process of selecting the ISO and your USB flash drive.
Using Rufus
Rufus is a more lightweight alternative, but you need to use the DD mode to make it work. Download Rufus from https://rufus.ie/. Either install it or use the portable version. Select the destination drive and the Proxmox VE ISO file.