Reboot to any grub entry

grubreboot.bash

#!/bin/bash

entries_array=()

function show_entries() {
    echo
    echo "Grub entries:"
    echo
    # Print the array elements
    i=0
    for element in "${entries_array[@]}"; do
        counter=$((counter+1))
    echo "${counter}. $element"
    done
    echo
}

function read_entries() {
    while IFS= read -r line; do
        entries_array+=("$line")
    done < <(awk -F\' '/menuentry / {print $2}' /boot/grub/grub.cfg)
}

read_entries
show_entries
read -p "Select an entry: " choice

if (( choice >= 0 && choice  <= ${#entries_array[@]} )); then
  echo "Rebooting on $choice: ${entries_array[choice - 1]}"
  sudo grub-reboot "${entries_array[choice - 1]}"
  sleep 3 && sudo reboot
else
  echo "Invalid index!"
fi