# https://wiki.archlinux.org/index.php/Dm-crypt/Device_encryption#Keyfiles
cp /root/luks/host-$hostname /mnt/crypto_keyfile.bin
# https://wiki.archlinux.org/index.php/Dm-crypt/Device_encryption#Keyfiles
cp /root/luks/host-$hostname /mnt/crypto_keyfile.bin