Revert "replace oooold reference to rstudio module w/link to launcher…

… app" - that was not supposed to be pushed directly to main

This reverts commit aaa29ad.

_compdemos/howtoRhino.md

@@ -52,7 +52,8 @@ drwxrwsr-x 4 mrg SciComp  53 Aug 25 09:14 econofile
 
 You can run an app directly on the rhino node to which you are connected. This is useful for lightweight apps and testing, but please refrain from running compute-intensive (CPU time and/or memory resources) processes as the rhino machines are a shared resource. To run directly, simply start your GUI application. Common apps include:
 
-  - Rstudio - See the [RStudio documentation](/scicomputing/software_R/#run-rstudio-server-on-an-hpc-machine).
+  - Rstudio - run `module load R/3.4.1-foss-2016b-fh2 rstudio` followed by `rstudio` to start. You can load any version of the R environment module you like.
+  > The Rstudio program (and rsession) tend to be resource hogs. For this reason, we limit each user to one rstudio session per rhino (or lamprey) at a time. If we see more than one rstudio session for one user, we send a warning email, and give the user an opportunity to exit one of the sessions.
   - MATLAB - run `module load matlab/R2016b` followed by `matlab` to start. There are several versions of MATLAB installed, run `module list matlab` to see them all.
   - Mozilla/Firefox - it can be handy to run a browser on the remote system sometimes. Start one by simply running the `firefox` command.