The following example shows how to display who is logged in to the system.
$ who holly 1 console May 7 07:30 kryten pts/0 2 May 7 07:35 (starbug) 4 lister pts/1 May 7 07:40 3 (bluemidget)
Identifies the user name of the logged-in user.
Identifies the terminal line of the logged-in user.
Identifies the date and time that the user logged in.
(Optional) Identifies the host name if a user is logged in from a remote system.