.\" Copyright (c) 1980 Regents of the University of California.
.\" All rights reserved. The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\" @(#)whoami.1 6.3 (Berkeley) %G%
whoami \- print effective current user id
It works even if you are su'd, while `who am i' does not since
/etc/passwd Name data base