[HOWTO] Automatically Unlock and Automount LUKS Encrypted Drives

Switch up to root

su -
Password: xxxxx

Create a keyfile containing random data, make it readable onlly to root

dd if=/dev/urandom of=/root/keyfile bs=1024 count=4
chmod 0400 /root/keyfile

The following requires the crypto drive partition, X being the drive and Y the partition. ie: sda1

cryptsetup luksAddKey /dev/sdXY /root/keyfile

Enter the password to unlock the drive.

vi /etc/crypttab

and add an entry:

sdXY_crypt /dev/disk/by-uuid/247ad289-dbe5-4419-9965-e3cd30f0b080 /root/keyfile luks

vi /etc/fstab

and add an entry:

/dev/mapper/sdXY_crypt /media/sdXY ext3 defaults 0 2

reboot