users, u - Displays a compact list of users who are on the system
The users command lists the login names of the users currently on the sys-
tem in a compact, one-line format. The usernames are in collated order.
To list the users currently logged in to your system, enter:
The system responds as follows:
berg jackson diaz shahuri smith wong
Commands: finger(1), last(8), w(1), who(1)