R command line startup options

--quiet: suppresses the startup message.

--slave: more quiet than --quiet in that it does not print the input.

--no-restore: Does not restore a previously saved workspace. Thus, the workspace is empty.

--no-save: Do not save a workspace when R is exited. Compare with quit(save='no')

--no-init-file: Don't read ~/.Rprofile nor .Rprofile.

--no-environ: Don't search for site and user files to process for setting environment variables.