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aerodomigue/upgrade_debian_12_to_13.sh

Created August 17, 2025 11:15
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Upgrade LXC Debian 12 to 13 (copy/paste solution)
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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
@calvinthefreak

calvinthefreak commented Nov 6, 2025

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

@dromer1967

dromer1967 commented Aug 7, 2026

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Thanks so much! My proxmox community scripts npm lxc needed an update but couldn't because of debian 13 requirement. Your script updated it perfectly to debian 13 after which I could run the normal update.

@Blener

Blener commented Aug 27, 2026

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Thank you for the script. I added a check before the upgrade because I have some containers that are not debian, it's in here

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