Ubuntu 16.04 - Update CUDA 9.0 to 9.1

Hi

I currently have CUDA 9.0 installed for an NVidia 1050Ti GPU based laptop along with cuDNN 7.0.5. What is the process of updating the kit to CUDA 9.1 and would I need to update cuDNN as well?

Thanks

Get your installers here: http://www.nvidia.com/getcuda
Read the appropriate install guide carefully: http://docs.nvidia.com/cuda/index.html#installation-guides

Yes, you will need to update cuDNN, as cuDNN is built against a specific CUDA version.