whoami - print effective userid
whoami [OPTION]...
Print the user name associated with the current effective user ID. Same as id -un.
Written by Richard Mlynarik.
Report bugs to <bug-coreutils@gnu.org>.
Copyright (C) 2006 Free Software Foundation, Inc. This is free software. You may redistribute copies of it under the terms of the GNU General Public License <http://www.gnu.org/licenses/gpl.html>. There is NO WARRANTY, to the extent permitted by law.
The full documentation for whoami is maintained as a Texinfo manual. If the info and whoami programs are properly installed at your site, the command
info whoami
should give you access to the complete manual.