The MRAN url copied into /etc/R/Rprofile.site should be https rather than http in order to prevent a big red warning message every time RStudio is opened:
"WARNING: Your CRAN mirror is set to "http://mran.revolutionanalytics.com/snapshot/2015-05-06" which has an insecure (non-HTTPS) URL. The repository was likely specified in .Rprofile or Rprofile.site so if you wish to change it you may need to edit one of those files. You should either switch to a repository that supports HTTPS or change your RStudio options to not require HTTPS downloads.
To learn more and/or disable this warning message see the "Use secure download method for HTTP" option in Tools -> Global Options -> Packages."
The MRAN url copied into /etc/R/Rprofile.site should be https rather than http in order to prevent a big red warning message every time RStudio is opened:
"WARNING: Your CRAN mirror is set to "http://mran.revolutionanalytics.com/snapshot/2015-05-06" which has an insecure (non-HTTPS) URL. The repository was likely specified in .Rprofile or Rprofile.site so if you wish to change it you may need to edit one of those files. You should either switch to a repository that supports HTTPS or change your RStudio options to not require HTTPS downloads.
To learn more and/or disable this warning message see the "Use secure download method for HTTP" option in Tools -> Global Options -> Packages."