25 Jul 2011
http://www.howtoforge.com/how-to-encrypt-directories-partitions-with-ec…
http://www.hermann-uwe.de/blog/howto-disk-encryption-with-dm-crypt-luks…
http://www.richardneill.org/a22p-mdk11-0.php#encrypt2
visualizar o conteúdo da swap:
cat /dev/[swap-partition] | strings