Proxmox 8 и выше:

nano /etc/apt/sources.list.d/pve-enterprise.list
#deb https://enterprise.proxmox.com/debian/pve bookworm enterprise
deb http://download.proxmox.com/debian/pve bookworm pve-no-subscription
nano /etc/apt/sources.list.d/ceph.list
#deb https://enterprise.proxmox.com/debian/ceph-quincy bookworm enterprise
deb http://download.proxmox.com/debian/ceph-quincy bookworm no-subscription

После обновляем:

apt update && apt upgrade -y

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