1.\" Copyright (c) 1983, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)talk.1 8.1 (Berkeley) 6/6/93 33.\" $Id$ 34.\" 35.Dd June 6, 1993 36.Dt TALK 1 37.Os BSD 4.2 38.Sh NAME 39.Nm talk 40.Nd talk to another user 41.Sh SYNOPSIS 42.Nm 43.Ar person 44.Op Ar ttyname 45.Sh DESCRIPTION 46.Nm Talk 47is a visual communication program which copies lines from your 48terminal to that of another user. 49.Pp 50Options available: 51.Bl -tag -width ttyname 52.It Ar person 53If you wish to talk to someone on your own machine, then 54.Ar person 55is just the person's login name. If you wish to talk to a user on 56another host, then 57.Ar person 58is of the form 59.Ql user@host 60or 61.Ql host!user 62or 63.Ql host:user . 64.It Ar ttyname 65If you wish to talk to a user who is logged in more than once, the 66.Ar ttyname 67argument may be used to indicate the appropriate terminal 68name, where 69.Ar ttyname 70is of the form 71.Ql ttyXX . 72.El 73.Pp 74When first called, 75.Nm 76sends the message 77.Bd -literal -offset indent -compact 78Message from TalkDaemon@his_machine... 79talk: connection requested by your_name@your_machine. 80talk: respond with: talk your_name@your_machine 81.Ed 82.Pp 83to the user you wish to talk to. At this point, the recipient 84of the message should reply by typing 85.Pp 86.Dl talk \ your_name@your_machine 87.Pp 88It doesn't matter from which machine the recipient replies, as 89long as his login-name is the same. Once communication is established, 90the two parties may type simultaneously, with their output appearing 91in separate windows. Typing control-L 92.Ql ^L 93will cause the screen to 94be reprinted, while your erase, kill, and word kill characters will 95behave normally. To exit, just type your interrupt character; 96.Nm 97then moves the cursor to the bottom of the screen and restores the 98terminal to its previous state. 99.Pp 100Permission to talk may be denied or granted by use of the 101.Xr mesg 1 102command. At the outset talking is allowed. Certain commands, in 103particular 104.Xr nroff 1 105and 106.Xr pr 1 , 107disallow messages in order to 108prevent messy output. 109.Pp 110.Sh FILES 111.Bl -tag -width /var/run/utmp -compact 112.It Pa /etc/hosts 113to find the recipient's machine 114.It Pa /var/run/utmp 115to find the recipient's tty 116.El 117.Sh SEE ALSO 118.Xr mail 1 , 119.Xr mesg 1 , 120.Xr who 1 , 121.Xr write 1 122.Sh BUGS 123The version of 124.Xr talk 1 125released with 126.Bx 4.3 127uses a protocol that 128is incompatible with the protocol used in the version released with 129.Bx 4.2 . 130.Sh HISTORY 131The 132.Nm 133command appeared in 134.Bx 4.2 . 135