cryptsetup luksFormat --type luks2 /dev/sdc

cryptsetup luksOpen /dev/sdc backup

mkfs.ext4 /dev/mapper/backup

mount /dev/mapper/backup /mnt/


cryptsetup -v status backup
cryptsetup luksDump /dev/sdc

ssh-keygen
ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.19.1
ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.19.17