ubuntu check cuda devices code example

Example 1: how to check do my system has cudnn

-- Found cuDNN (include: /usr/local/cuda-7.0/include, library: /usr/local/cuda-7.0/lib64/libcudnn.so)

-- NVIDIA CUDA:
--   Target GPU(s)     :   Auto
--   GPU arch(s)       :   sm_30
--   cuDNN             :   Yes

Example 2: check if cuda installed

# nvcc -V
 nvcc: NVIDIA (R) Cuda compiler driver
 Copyright (c) 2005-2015 NVIDIA Corporation
 Built on Tue_Aug_11_14:31:50_CDT_2015
 Cuda compilation tools, release 7.5, V7.5.17