Fixing apt update/upgrade on Proxmox (without subscription)

By Albin / 2020-02-24 – 2021-08-23

This is an extremely trivial guide – but when installing Proxmox for the first time I would have needed a guide like it.

As default, Proxmox is set to update against their paid enterprise repositories – but without a subscription you have no access to them. So what you have to do is remove the enterprise repository and add the free equivalent.

First, delete the following file:

rm /etc/apt/sources.list.d/pve-enterprise.list

Then edit your sources list:

nano /etc/apt/sources.list

Add or ensure it looks like this:

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

# Add the line below!
deb http://download.proxmox.com/debian/pve buster pve-no-subscription

# security updates
deb http://security.debian.org buster/updates main contrib

You should now be able to update your server and begin your virtualization adventure.