If you want to save time you may be interested in downloading the Xubuntu GIS Installations-/Live-ISO-Image Version 1.1.
This DVD image can be used both as a Live-DVD as well as an installation medium. It is now based on the Xubuntu 14.04_2 distribution. furthermore, it contains the GIS Software including the SAGA2.1.0 Fix for
RSAGA as well as the Orfeo toolbox as needed for the MOC classes (updated: 04/12/2015).