install specific cuda ver

Author: js1010

.travis.yml

@@ -29,7 +29,7 @@ before_install:
   - wget https://developer.download.nvidia.com/compute/cuda/repos/${UBUNTU_VERSION}/x86_64/7fa2af80.pub
   - sudo apt-key add 7fa2af80.pub
   - sudo apt update -qq
-  - sudo apt install -y cuda
+  - sudo apt install -y cuda-${CUDA_SHORT/./-}
   - sudo apt clean
   - export CUDA_HOME=/usr/local/cuda-${CUDA_SHORT}
   - export LD_LIBRARY_PATH=${CUDA_HOME}/lib64:${LD_LIBRARY_PATH}