Многообразный Full disk encryption on drives; ext4 and GPT partition table; enter only 1 key

гm looking for в руководителя (with clear steps) сходный to the following article, but using ext4 and GPT partition tables.

Full disk encryption with многообразный Btrfs and drives in Ubuntu · Брайс Ниегген'с blog

I will be doing в new installation of 14.04 LTS on brand new disks. I will be upgrading to 16.04 very soon.

I have an SSD and HDD. Both should be fully encrypted. Both should be accessible after entering в single passphrase on bootup. (В key on в USB stick would be acceptable too.)

The SSD will hold these partitions:

/ boot (I assume unencrypted)
/ (root)
/ home
and all the общепринятый directories in the Linux file system

The HDD will be mainly for pictures, аудио, видео, .deb поля, zipped поля, backups, и т.д.