---

test -d /sys/firmware/efi && echo UEFI || echo BIOS
cat /etc/os-release
uname -a
uname -r
mokutil --sb-state 2>/dev/null || true

lsblk -f
blkid

cat /etc/default/grub
ls -lah /boot
find /boot -maxdepth 1 -type f | sort

sed -n '1,220p' /etc/grub.d/40_custom
grub2-editenv list 2>/dev/null || true

grep -n '^menuentry ' /boot/grub*/grub.cfg 2>/dev/null | head -n 30
wc -c /boot/grub*/grub.cfg 2>/dev/null