Finger

Finger is a simple protocol which provides an interface to the Name and Finger programs at several network sites. These programs return a friendly, human-oriented status report on either the system at the moment or a particular person in depth. Described in RFC 742.

efingerd
The most commond finger daemon running on the tildeverse is efingerd. This daemon gives free control to the admin and users of a system to respond to finger queries however they'd like. Users can add a .efingerd file to their home directory, make it executable, and use that as a shell-script to handle the responses. The incoming data to the script uses the following arguments:
 * 1) !/bin/sh
 * 2) $1 = identity of remote user fingering you
 * 3) $2 = address of remote machine fingering you
 * 4) $3 = name of user being fingered (you!)