exit $ret
-# Explaining this whole thing. The host amy is used by someone else,
-# i back it up to my extra big partition on one computer.
-# But I also want to restore it and test out the restoration on
-# a computer I usually use. For this, I created a separate partition
-# that has the amy encryption password, and a separate boot so
-# that I could encrypt my own boot partition if I want. Then,
-# I backup from this big partition into that partition in order
-# to boot and run it.
-#
-# In order to boot and run it:
-
-# mount -o bind /mnt/root2/root_ubuntubionic /mnt/1
-# cd /mnt/1
-# /b/ds/gen-amy-fstab ubuntubionic .
-# teeu /mnt/1/etc/default/grub <<<'GRUB_DISABLE_OS_PROBER=true'
-# mount -o bind /mnt/boot2/boot_ubuntubionic boot
-# mount -o bind /dev dev
-# mount -o bind /proc proc
-# mount -o bind /sys sys
-# mkdir -p boot/efi
-# mount $(awk '$2 == "/boot/efi" {print $1}' /etc/mtab) boot/efi
-# chroot .
-# apt install grub-efi
-
-# this is taken from partition.DEFAULT
-# ssds=()
-# for disk in $(lsblk -do name,tran -n | awk '$2 ~ "^(sata|nvme)$" { print $1 }'); do
-# case $(cat /sys/block/$disk/queue/rotational) in
-# 0) ssds+=(/dev/$disk) ;;
-# 1) : ;; # hdd
-# *) echo "$0: error: unknown /sys/block/$disk/queue/rotational: \
-# $(cat $disk/queue/rotational)" ;;
-# esac
-# done
-
-# this is from /a/bin/fai/fai/config/scripts/GRUB_EFI/10-setup
-# GROOT=$(grub-probe -tdrive -d ${ssds[@]})
-# echo "GROOT=$GROOT"
-# grub-install --no-floppy --modules=part_gpt "$GROOT"
-# update-grub
-# update-initramfs -u