Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!
openssl genrsa -des3 -out rootCA.key 4096
State as of 2017-11-08.
You can also check a guide to upgrade CUDA on a [PC with with GTX 980 Ti and Ubuntu 16.04](https://gist.github.com/bzamecnik/61b293a3891e166797491f38d579d060.