Editing Who (Unix) (section)

== Specification ==
The [[Single UNIX Specification]] (SUS) specifies that <code>who</code> should list information about accessible users. The [[X/Open System Interfaces Extension|XSI]] extension also specifies that the data of the username, terminal, login time, process ID, and time since last activity occurred on the terminal, furthermore, an alternate system database used for user information can be specified as an optional argument to {{mono|who}}.

The command can be invoked with the arguments <code>am i</code> or <code>am I</code> (so it is invoked as <code>who am i</code> or <code>who am I</code>), showing information about the current terminal only (see the command {{mono|[[tty (Unix)|tty]]}} and the <code>-m</code> option below, of which this invocation is equivalent).