luks partition einrichten

keyfile erstellen

dd bs=512 count=4 if=/dev/random of=/home/user/luks3.key iflag=fullblock

crytdisk erstellen

sudo cryptsetup luksFormat /dev/nvme1n1 /home/user/luks3.key

device open

$sudo cryptsetup open /dev/nvme1n1 backupdisk --key-file /home/user/luks3.key

format disk

sudo mkfs.ext4 /dev/mapper/backupdisk

crypttab /fstab

#/etc/cryptab
backupdisk /dev/nvme1n1 /root/.backupdisk.key luks

/dev/mapper/backupdisk /mnt/backupdisk ext4 defaults 1 2