BSD 2.11 - man page for talk (bsd section 1)

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TALK(1) 										  TALK(1)

       talk - talk to another user

       talk person [ ttyname ]

       Talk  is  a  visual communication program which copies lines from your terminal to that of
       another user.

       If you wish to talk to someone on you own machine, then person is just the person's  login
       name. If you wish to talk to a user on another host, then person is of the form :

			   host!user  or
			   host.user  or
			   host:user  or

       though host@user is perhaps preferred.

       If you want to talk to a user who is logged in more than once, the ttyname argument may be
       used to indicate the appropriate terminal name.

       When first called, it sends the message

	    Message from TalkDaemon@his_machine...
	    talk: connection requested by your_name@your_machine.
	    talk: respond with: talk your_name@your_machine

       to the user you wish to talk to. At this point, the recipient of the message should  reply
       by typing

	    talk  your_name@your_machine

       It  doesn't  matter from which machine the recipient replies, as long as his login-name is
       the same.  Once communication is established, the two  parties  may  type  simultaneously,
       with  their  output appearing in separate windows.  Typing control L will cause the screen
       to be reprinted, while your erase, kill, and word kill characters will  work  in  talk  as
       normal.	 To  exit,  just type your interrupt character; talk then moves the cursor to the
       bottom of the screen and restores the terminal.

       Permission to talk may be denied or granted by use of the mesg  command.   At  the  outset
       talking	is allowed.  Certain commands, in particular nroff and pr(1) disallow messages in
       order to prevent messy output.

       /etc/hosts     to find the recipient's machine
       /var/run/utmp  to find the recipient's tty

       mesg(1), who(1), mail(1), write(1)

       The version of talk(1) released with 4.3BSD uses a protocol that is incompatible with  the
       protocol used in the version released with 4.2BSD.

4.2 Berkeley Distribution		November 27, 1996				  TALK(1)
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