felhom.eu/documentation/audits/kernel-spike-2026-10-07/tools/spike-undo.sh

#!/bin/bash
# Undo spike-setup.sh: the original /etc/default/grub, no spike entries, no one-shot snippet. The new kernel stays installed.
set -euo pipefail
[ -f /etc/default/grub.felhom-spike-orig ] && cp -p /etc/default/grub.felhom-spike-orig /etc/default/grub
rm -f /etc/grub.d/01_felhom_oneshot /etc/grub.d/41_felhom_spike /boot/efi/EFI/proxmox/felhom-oneshot.env
update-grub 2>&1 | tail -1; grep -c 'felhom' /boot/grub/grub.cfg || true