Script to create crypt-luks drives formated in btrfs

make-crypt-btrfs.sh

#!/bin/bash

# List of commands required for execution of the setup script
commandsRequire=("cryptsetup" "dd" "mkfs.btrfs")

err11="I require"
err12="but it's not installed. Aborting..."

mes11="Found"

#verify current execution environment has root permission
if [ "$EUID" -ne 0 ]
  then echo "Please run as root"
  exit
fi

echo "verifying requirements...";

for i in "${commandsRequire[@]}"
do
    if hash $i 2>/dev/null; then
        echo >&2 "$mes11 ${i}";
    else
        echo >&2 "$err11 ${i} $err12"; 
        exit 1; 
    fi
done

if hash apt 2>/dev/null; then
    apt install btrfs-tools cryptsetup lvm2
fi

if hash pacman 2>/dev/null; then
    pacman -S btrfs-progs cryptsetup lvm2
fi

read -p "Specify the name of the device as identified by udev WITHOUT '/dev/' (sda,sdb,mmcblk0 etc..) :" device

# Better safe then sorry
read -p "Erasing a device cannot be undone are you sure you want to continue? [y]yes / [n]no :" yn
case $yn in
    [Yy]* ) ;;
    [Nn]* ) exit; ;;
    * ) echo "Please answer: yes[y] / no[n]";;
esac

echo "Creating encrypted disc"
#cryptsetup -v --cipher aes-xts-plain64 --key-size 512 --hash sha512 --iter-time 5000 --use-urandom --verify-passphrase luksFormat /dev/$device
cryptsetup -y -v luksFormat /dev/$device

echo "Mounting new disc"
cryptsetup luksOpen /dev/$device TEMP_MAP

echo "Wiping disc with /dev/zero"
dd if=/dev/zero of=/dev/mapper/TEMP_MAP

echo "Formating disc with btrfs"
mkfs.btrfs /dev/mapper/TEMP_MAP

echo "Unmounting disc"
cryptsetup luksClose TEMP_MAP