(sh-utils.info)users invocation

`users': Print login names of users currently logged in
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   `users' prints on a single line a blank-separated list of user names
of users currently logged in to the current host.  Each user name
corresponds to a login session, so if a user has more than one login
session, that user's name will appear the same number of times in the
output. Synopsis:

     users [FILE]

   With no FILE argument, `users' extracts its information from the
file `/etc/utmp'.  If a file argument is given, `users' uses that file
instead.  A common choice is `/etc/wtmp'.

   The only options are `--help' and `--version'.  Note: Common
options.