apt update
apt install -y proxmox-default-kernel
update-grub
reboot

重启后确认：

uname -r

若不是 -pve：

apt remove -y linux-image-amd64
update-grub
reboot

继续：

apt update
apt install -y proxmox-ve postfix open-iscsi chrony ifupdown2
sed -i 's/^deb/# deb/g' /etc/apt/sources.list.d/pve-enterprise.list 2>/dev/null || true
echo "deb http://download.proxmox.com/debian/pve bookworm pve-no-subscription" > /etc/apt/sources.list.d/pve-no-subscription.list
apt update

systemctl restart pve-cluster pvedaemon pvestatd pveproxy
pvecm status

若未建过集群：

pvecm create pve
pvecm updatecerts --force
systemctl restart pveproxy pvedaemon pvestatd

访问：

https://37.187.128.47:8006