Thanks for providing this simple, concise tutorial for installing the proprietary nvidia driver. After some unsuccessful attempts trying different tutorials, this one worked right away, with only one modification:
Instead of apt install ... I had to use apt-get install ...
Reference: LMDE 12 Cinnamon/Mate, April 2012 release using the 290... Nvidia driver for a PNY Quadro 600 card.
Important: I think that in my previous attempts the nouveau driver messed up the Nvidia proprietary driver install. In the end I was left with a text only environment, but your tutorial and the blacklisting of the nouveau driver worked out of the box and fixed the problem.
Asus Sabertooth X79, i7 3930K CPU, 8x4GB Kingston DDR3 RAM, Noctua NH-D14 CPU cooler, Sapphire 7770 GPU, PNY Quadro 2000 GPU, Asus Xonar Essence STX, Sandisk Extreme 120GB SSD + various HD, Corsair 500R case, SeaSonic 660W Gold X PS