It can be done via talk,a program installed under BSD but disabled by default. All you need is to change the inetd configuration database file:
% sudo pico /etc/inetd.confUncomment the "ntalk" line:
ntalk dgram udp wait root /usr/libexec/tcpd ntalkdAfter rebooting, to chat with a user connected to the same machine, just type:
% talk [username]Refer to the very easy talk manual ("man talk") to find out more details. Hope this helps...
[Editor's note: I thought I had read about various security holes in the "ntalk" server, and that's why it was disabled by default -- does anyone have more information on this subject?]

