firefly@unknown:~$ sudo lsblk -o NAME,UUID,MOUNTPOINT
[sudo] password for firefly:
NAME UUID MOUNTPOINT
sda
└─sda1 edc7cffd-f619-4fa5-8f73-95682d73690d /boot
sdb
└─sdb1
└─sdb1_crypt
b8c49f89-56c5-4095-a8ae-ff3f84da100f [SWAP]
sdc
└─sdc1 8f8106a3-6792-4d65-a073-727c9c1dbfbc
└─sdc1_crypt
b75ce9ee-725e-482e-a0a1-302d398a3235 /
sdd
├─sdd1 7d5b1788-22ee-4740-b869-0733d64b4896
└─sdd2 422a78f4-6d95-4b90-954b-38f2cc6a9bd7
└─sdd2_crypt
69279f95-6ca4-4ead-9d67-f1211da66fff /tmp
sr0
sr1 2015-05-13-16-15-47-00 /media/firefly/VBOXADDITIONS_4.3.28_
firefly@unknown:~$ cat /etc/crypttab
sdc1_crypt UUID=8f8106a3-6792-4d65-a073-727c9c1dbfbc none luks,discard
sdb1_crypt /dev/sdb1 /dev/urandom swap,cipher=aes-xts-plain64,size=512
#sdd1_crypt UUID=7d5b1788-22ee-4740-b869-0733d64b4896 none luks
sdd2_crypt UUID=422a78f4-6d95-4b90-954b-38f2cc6a9bd7 none luks,discard
firefly@unknown:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
/dev/mapper/sdc1_crypt / ext4 errors=remount-ro 0 1
# /boot was on /dev/sda1 during installation
UUID=edc7cffd-f619-4fa5-8f73-95682d73690d /boot ext4 defaults 0 2
# Encrypted Swap
/dev/mapper/sdb1_crypt none swap sw 0 0
# Encrypted Tmp
/dev/mapper/sdd2_crypt /tmp ext4 defaults 0 0
# Encrypted Var
#/dev/mapper/sdd1_crypt /var ext4 defaults 0 0
firefly@unknown:~$ sudo cryptsetup luksDump /dev/sdd2
LUKS header information for /dev/sdd2
Version: 1
Cipher name: aes
Cipher mode: xts-plain64
Hash spec: sha1
Payload offset: 4096
MK bits: 512