any guide installing cuda/nvidia on linux?

[pay]

from what i understand from u, installing nvidia driver is all what it need to be done for running cudahashcat , is that right? (nothing else)
no nvidia cuda needed to be installed?

The only thing you need to do is to install the damn nvidia driver from www.nvidia.com as recommended on https://hashcat.net/

^^ comon be easy on me i wana be sure

another update
i decide to do some tests
i have a GTX 550 TI
and 2 tesla K20

ofc they are low cards but i just want to compare betwen them.
installing the drivers for the gtx 550 worked fine and i was able to run hashcat,
but after replacing to 1 tesla k20 it stoped to work (the graphic)
so i decide to remove all the drivers from nvidia (352) with apt-get purge nvidia*


then i installed an older drivers (340) apt-get install nvidia-340
after installing the driver i ran the hashcat with ./cudaHashcat64.bin -b
rebooted 
the error i receive is. "ERROR: No NVidia compatible platform found"

Code:

lspci | grep VGA

3D controller: NVIDIA Corporation GK110GL [Tesla K20c] (rev a1)

any suggestions?


update 2:
i downloaded the NVIDIA driver from the website and installed it (after removing all the nvidia driver), same result.