fatresizebug.sh

#!/bin/bash

set -ex

thumb="/dev/sda"

# sudo apt install qemu qemu-utils qemu-system ovmf

# wget -N http://deb.debian.org/debian/dists/trixie/main/installer-amd64/current/images/hd-media/boot.img.gz

wget -N https://d-i.debian.org/daily-images/amd64/daily/hd-media/boot.img.gz

gunzip --keep --force boot.img.gz

sudo dd status=progress if=boot.img of=${thumb}

qemu-system-x86_64 \
    -m 512 \
    -machine q35,accel=kvm \
    -cpu host \
    -drive file=${thumb},if=none,format=raw,id=thumb \
    -usb \
    -device usb-storage,drive=thumb \
    -boot menu=on

fatresize --progress --verbose --size 2G ${thumb}

# legacy
qemu-system-x86_64 \
    -m 512 \
    -machine q35,accel=kvm \
    -cpu host \
    -drive file=${thumb},if=none,format=raw,id=thumb \
    -usb \
    -device usb-storage,drive=thumb \
    -boot menu=on