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Complete Guide: Creating an LXC Container for Docker on Debian 12 (2025-2026)

AI only formatted this doc and added explanations where it knew. I confirm all the steps here were actually taken by me to achieve the desired result🙂

This guide walks you through setting up an unprivileged LXC container on Debian 12 to run Docker, using systemd for proper cgroup delegation.

Prerequisites

Debian 12 (Bookworm) host system

Making custom CloneZilla "Pro" ISO image w/o `nomodeset` option for better support on modern hardware

After numerous fails and hours of scouting the web, I finally resolved all the issues related with Clonezilla on modern hardware. You may call me dumb for not just pressing "K" in the scrambled Clonezilla GRUB screen to enable kernel modesetting but whatever idc I found that out only while inspecting GRUB config y'know. 🙂

For more info why that may be relevant in your case skip here

Step 1. Get and mount the latest ISO

Download the latest version (here I used Debian stable) → official link

	#!/usr/bin/env bash

	# Re-run the script as root if not already running as root
	if [ "$EUID" -ne 0 ]; then
	echo "This script requires root. Re-running with sudo..."
	exec sudo "$0" "$@"
	fi

	free_mem="$(free \| grep 'Mem:' \| awk '{print $7}')"
	used_swap="$(free \| grep 'Swap:' \| awk '{print $3}')"

	#!/usr/bin/env bash

	# activate `appimage-run` first: https://wiki.nixos.org/wiki/Appimage

	appimage=<your_appimage_path> # set your executable path

	QT_PLUGIN_PATH= appimage-run "$appimage" # RUN IT
	# SOURCE: https://discourse.nixos.org/t/appimage-run-fails-loading-qt-platform-plugin-xcb/29293

	#!/usr/bin/env bash

	# Re-run the script as root if not already running as root
	if [ "$EUID" -ne 0 ]; then
	echo "This script requires root. Re-running with sudo..."
	exec sudo "$0" "$@"
	fi

	ID="0000:00:14.0" # your controller id; look for ID with `sudo ls /sys/bus/pci/drivers/xhci_hcd/` (SUDO REQUIRED)

	#!/usr/bin/env bash
	echo "Disabling touchpad..."
	sudo modprobe -r psmouse
	echo "Enabling touchpad..."
	sudo modprobe psmouse
	echo "Should work now. Otherwise, check 'dmesg' or reboot"
	# SOURCE: https://askubuntu.com/q/671910

	#!/usr/bin/env bash

	# start `default` virtual network interface
	sudo virsh net-start default

	# SOURCE: https://forum.level1techs.com/t/solved-qemu-network-default-is-not-active-booting-from-hard-disk/194698

	#!/usr/bin/env bash

	# Check if the script is running with root privileges
	if [ $(id -u) != 0 ]; then
	echo "This script must be run as root."
	exit 1
	fi

	# Check if the teamviewerd process exists and kill it if it does
	if pgrep -x teamviewerd > /dev/null