這是本文件的舊版！
Cryptsetup
format
cryptsetup -v --cipher aes-xts-plain64 --key-size 512 --hash sha512 --iter-time 5000 --use-urandom --verify-passphrase luksFormat /dev/sdX0
產生亂數金鑰
dd if=/dev/random of=/etc/data_volume_password bs=1024 count=4
加入 key slot
cryptsetup luksAddKey /dev/sdX /data_volume_password
移除 key slot
cryptsetup luksKillslot /dev/sdX 1
