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.\" 34.Dd June 6, 1993 35.Dt TALK 1 36.Os BSD 4.2 37.Sh NAME 38.Nm talk 39.Nd talk to another user 40.Sh SYNOPSIS 41.Nm talk 42.Ar person 43.Op Ar ttyname 44.Sh DESCRIPTION 45.Nm Talk 46is a visual communication program which copies lines from your 47terminal to that of another user. 48.Pp 49Options available: 50.Bl -tag -width ttyname 51.It Ar person 52If you wish to talk to someone on your own machine, then 53.Ar person 54is just the person's login name. If you wish to talk to a user on 55another host, then 56.Ar person 57is of the form 58.Ql user@host 59or 60.Ql host!user 61or 62.Ql host:user . 63.It Ar ttyname 64If you wish to talk to a user who is logged in more than once, the 65.Ar ttyname 66argument may be used to indicate the appropriate terminal 67name, where 68.Ar ttyname 69is of the form 70.Ql ttyXX . 71.El 72.Pp 73When first called, 74.Nm talk 75sends the message 76.Bd -literal -offset indent -compact 77Message from TalkDaemon@his_machine... 78talk: connection requested by your_name@your_machine. 79talk: respond with: talk your_name@your_machine 80.Ed 81.Pp 82to the user you wish to talk to. At this point, the recipient 83of the message should reply by typing 84.Pp 85.Dl talk \ your_name@your_machine 86.Pp 87It doesn't matter from which machine the recipient replies, as 88long as his login-name is the same. Once communication is established, 89the two parties may type simultaneously, with their output appearing 90in separate windows. Typing control-L 91.Ql ^L 92will cause the screen to 93be reprinted, while your erase, kill, and word kill characters will 94behave normally. To exit, just type your interrupt character; 95.Nm talk 96then moves the cursor to the bottom of the screen and restores the 97terminal to its previous state. 98.Pp 99Permission to talk may be denied or granted by use of the 100.Xr mesg 1 101command. At the outset talking is allowed. Certain commands, in 102particular 103.Xr nroff 1 104and 105.Xr pr 1 , 106disallow messages in order to 107prevent messy output. 108.Pp 109.Sh FILES 110.Bl -tag -width /var/run/utmp -compact 111.It Pa /etc/hosts 112to find the recipient's machine 113.It Pa /var/run/utmp 114to find the recipient's tty 115.El 116.Sh SEE ALSO 117.Xr mail 1 , 118.Xr mesg 1 , 119.Xr who 1 , 120.Xr write 1 121.Sh BUGS 122The version of 123.Xr talk 1 124released with 125.Bx 4.3 126uses a protocol that 127is incompatible with the protocol used in the version released with 128.Bx 4.2 . 129.Sh HISTORY 130The 131.Nm 132command appeared in 133.Bx 4.2 . 134