Upgrade LXC Debian 12 to 13 (copy/paste solution)

upgrade_debian_12_to_13.sh

#!/bin/bash
# Update source from bookworm to trixie
sed -i 's/bookworm/trixie/g' /etc/apt/sources.list
apt-get update

# Upgrade to trixie
DEBIAN_FRONTEND=noninteractive apt-get -o Dpkg::Options::="--force-confold" dist-upgrade -y

# Disable services that break in LXC / containers (harmless if not present)
systemctl disable --now systemd-networkd-wait-online.service || true
systemctl disable --now systemd-networkd.service || true
systemctl disable --now ifupdown-wait-online || true

# Install ifupdown2 (better networking stack for LXC/VMs)
apt-get install -y ifupdown2

# Cleanup
apt-get autoremove --purge -y
apt-get clean

reboot

Execute the Script Directly

You can run this script with a single line using either curl or wget.

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Using Curl

This command downloads the script and pipes it directly to bash for execution. The -fsSL options make the command silent and follow redirects.

bash -c "$(curl -fsSL https://gist.githubusercontent.com/aerodomigue/0320ec3dffbc60caeaee8a6fc83cb470/raw/4b7f65f5adbf400d6bb9607c396fc79dfc7fe4c2/upgrade_debian_12_to_13.sh)"

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Using Wget

This command downloads the script and pipes it to bash for execution. The -O - option sends the content to standard output.

wget -O - https://gist.githubusercontent.com/aerodomigue/0320ec3dffbc60caeaee8a6fc83cb470/raw/4b7f65f5adbf400d6bb9607c396fc79dfc7fe4c2/upgrade_debian_12_to_13.sh | bash

Thanks budy. Quite nice to have this, could've written that my self, but heh, lazyness is the key :D