Proxmox VE smooth upgrade

Recently, PVE released version 8.4.0, while I am still using 8.3.0 and plan to upgrade to the latest version.

1. Open the PVE management backend, select pve, and click Shell. This will open the command line for PVE.

2. By default, if there is no enterprise subscription, updates cannot be checked, so you need to add a no-subscription source.list.

nano /etc/apt/sources.list.d/pve-no-subscription.list
# Enter the following line
deb http://download.proxmox.com/debian/pve bookworm pve-no-subscription

3. Update the PVE source and upgrade the PVE.

apt update
apt list --upgradable
apt dist-upgrade
reboot

4. After the upgrade is complete, check the PVE version.

pveversion -v