How to Determine Who Is Logged in to a System

1. Log into the system to be shut down.

2. Display all users who are logged in to the system.

   $ who

Example 10–1 Determining Who Is Logged in to a System

The following example shows how to display who is logged in to the system.

$ who
holly       console      May  7 07:30
kryten      pts/0        May  7 07:35   (starlite) 
lister      pts/1        May  7 07:40   (bluemidget)

• Data in the first column identifies the user name of the logged-in user

• Data in the second column identifies the terminal line of the logged-in user

• Data in the third column identifies the date and time that the user logged in

• Data in the forth column, if present, identifies the host name if a user is logged in from a remote system