who

Additional Notes

who displays information about users currently logged into the system, including their terminal, login time, and origin.

For a simpler list of usernames, use users. For detailed session activity, use w.

Syntax

who [options]
who am i

Parameters

• options: Flags that change how who behaves.

Common Options

• -a: Show all available information.
• -b: Show last system boot time.
• -q: Show login names and count.

Examples

who
who -b
who -q

Practical Notes

Use w when you also want to see what logged-in users are doing.