pinky - lightweight finger
pinky [OPTION]... [USER]...
A lightweight ‘finger’ program; print user information. The utmp file will be /var/run/utmp.
Written by Joseph Arceneaux, David MacKenzie, and Kaveh Ghazi.
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 pinky is maintained as a Texinfo manual. If the info and pinky programs are properly installed at your site, the command
info pinky
should give you access to the complete manual.