All right, so here I am on my terminal.
And on my terminal, I'm using WHO.
And that's showing all the users that are currently logged in.
Still this user on TTY3 that results from the CHVT demo.
Then when I use WHO minus minus help,
I can see a nice overview of all the different options that
are available.
Did you notice, by the way, that we have
short options and long options?
You can use either minus D or minus minus that, for instance.
Many options exist in a short and in a long alternative.
And pick whichever you want to use.