I am new to cuda. I am not sure whether I have installed the cuda. But I have installed an NVIDIA driver of 470 and I can run PyTorch codes on GPU. I can also print cuda's and cudnn's versions via Torch.
The strange thing is that there is no cuda directory in /usr/local/. I also try the find command find / -type d -name cuda 2>/dev/null. The results are shown 
. I checked some directories, but it seems that they aren't the exact cuda directory.
Could you please help me to figure out whether I install the cuda? Or where I might install the cuda?