What is Proxmox Virtual Environment (VE)?
Proxmox VE (Virtual Environment) is an open-source platform for running and managing virtual machines (VMs) and containers, with built-in tools for clustering, backups, and web-based administration.
Video Instructions: Upgrade Proxmox Version 8 to Version 9
STEP 1 – Update and Clean Current System
apt update && apt full-upgrade -y
apt –purge autoremove -y
STEP 2 – Reboot System
reboot
STEP 3 – Backup Configuration Files
cp -a /etc/apt/sources.list /etc/apt/sources.list.bak
cp -a /etc/apt/sources.list.d /etc/apt/sources.list.d.bak
STEP 4 – Update The Repositories To Debian 13 Trixie
cat <<EOF > /etc/apt/sources.list
deb http://deb.debian.org/debian trixie main contrib
deb http://deb.debian.org/debian trixie-updates main contrib
deb http://security.debian.org/debian-security trixie-security main contrib
EOF
STEP 5 – Update The Proxmox Repositories
cat <<EOF > /etc/apt/sources.list.d/pve-no-subscription.list
deb http://download.proxmox.com/debian/pve trixie pve-no-subscription
EOF
STEP 6 – Update The Proxmox Repositories
cat <<EOF > /etc/apt/sources.list.d/pve-no-subscription.list
deb http://download.proxmox.com/debian/pve trixie pve-no-subscription
EOF
STEP 6a Optional – Remove Enterprise List (if it is present)
rm -f /etc/apt/sources.list.d/pve-enterprise.list
STEP 6b Optional – If You Have a Subscription
cat <<EOF > /etc/apt/sources.list.d/pve-enterprise.list
deb https://enterprise.proxmox.com/debian/pve trixie pve-enterprise
EOF
STEP 6c Optional – Update Ceph Repo (if you are using Ceph the distributed storage system)
cat <<EOF > /etc/apt/sources.list.d/ceph.list
deb http://download.proxmox.com/debian/ceph quincy no-subscription
EOF
STEP 7 – Update Proxmox
apt update
apt full-upgrade -y
STEP 8 – Reboot System
reboot
STEP 9 – Reboot System
pveversion