Install Proxmox Backup Server in an LXC Container

Setup a Debian 12 LXC with a minimum of 2 cores and 2GB of RAM.

Once it has booted, proceed with the following instructions...

Update the system

apt update
apt dist-upgrade -y

Add the repository key

wget https://enterprise.proxmox.com/debian/proxmox-release-bookworm.gpg -O /etc/apt/trusted.gpg.d/proxmox-release-bookworm.gpg

Add the repo to the sources

echo "deb http://download.proxmox.com/debian/pbs bookworm pbs-no-subscription" >> /etc/apt/sources.list

Update the package cache and install Proxmox Backup Server

apt update
apt install proxmox-backup-server -y

You should then be able to access the web UI on port 8007