couldn't install cuda on tx2

I used Jetpack3.1 to install everything in TX2 and I followed the steps in the install guide. But after installation, it seems that CUDA is not installed on TX2 and I can’t find /usr/local/cuda-8.0. I do remember that I selected CUDA on Target and I re-installed many times, but still not right. What’s the problem might be ?

problems solved. I tried another time and this time, I selected nothing but install cuda on target and it works.

Just quoting this because it didn’t show up originally.