Add info on R kernels

Author: sdgilley

articles/machine-learning/how-to-access-terminal.md

@@ -102,7 +102,9 @@ To add a new Jupyter kernel to the compute instance:
     python -m ipykernel install --user --name newenv --display-name "Python (newenv)"
     ```
 
-Any of the [available Jupyter Kernels](https://github.com/jupyter/jupyter/wiki/Jupyter-kernels) can be installed.
+Any of the [available Jupyter Kernels](https://github.com/jupyter/jupyter/wiki/Jupyter-kernels) can be installed.  
+
+To create new kernels, use the `IRkernel` package in R.  If you create the new kernel from within a notebook, close the notebook and reopen it to see the new kernel.  For more information about IRkernel, see [Native R kernel for Jupyter](https://cran.r-project.org/web/packages/IRkernel/readme/README.html).
 
 ### Remove added kernels