==== PVE 6 ====
    - <code h /etc/apt/sources.list>
deb http://ftp.tw.debian.org/debian buster main contrib

deb http://ftp.tw.debian.org/debian buster-updates main contrib

deb http://download.proxmox.com/debian/pve buster pve-no-subscription

# security updates
deb http://security.debian.org buster/updates main contrib
</code>
    - <code h /etc/apt/sources.list.d/pve-enterprise.list>
#deb https://enterprise.proxmox.com/debian/pve stretch pve-enterprise
</code>