> On May 14, 2019, at 10:23 AM, Valeri Galtsev <galtsev at kicp.uchicago.edu> wrote: > > Look, in the following four command lines executed in the shell: > > su > > su fred > > su - fred > > su -l fred > > - in all four of them: > > "su" is a command > > "fred" is an argument (wherever it is present) > > "-" (surrounded by spaces on both sides) and "-l" are command options > > This is standard terminology used in UNIX, Linux, etc for several decades. And finally, RTFM, please. > > And also, can we close this thread, please. Just wow. No point in even posting in here anymore. Cheers, Bee