wall, echo, talk, are all some of the ones you can use.

if you have permision (ie as root) you can 
echo "hi" >> /dev/pts/pts/?

you can use wall or the really old unix tool talk will give you an irc
or im style communication with the user.

-Bill

On Wed, 2003-07-23 at 11:24, Bill Nash wrote:
> On Wed, 23 Jul 2003, Bart Garst wrote:
> 
> > I remember reading (on this list) about a command that allows me to
> send a
> > message to another users console.
> >
> > Does anybody remember/know the name of the program I'm thinking of?
> >
> 
> 'uuencode /bin/bash foo | wall`?
> 
> Wait, no, how about:
> 
> `echo "hey, log off now or else" | write useridhere`
> 
> - billn
> 
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Bill Warner <wwarner@direct-alliance.com>
Direct Alliance