4.3BSD-Reno/src/usr.bin/wall/wall.1

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.\" Copyright (c) 1989 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms are permitted
.\" provided that the above copyright notice and this paragraph are
.\" duplicated in all such forms and that any documentation,
.\" advertising materials, and other materials related to such
.\" distribution and use acknowledge that the software was developed
.\" by the University of California, Berkeley.  The name of the
.\" University may not be used to endorse or promote products derived
.\" from this software without specific prior written permission.
.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
.\"
.\"	@(#)wall.1	6.3 (Berkeley) 10/28/89
.\"
.UC 7
.TH WALL 1 "October 28, 1989"
.UC 4
.SH NAME
wall \- write a message to users
.SH SYNOPSIS
.B wall
[ file ]
.SH DESCRIPTION
.I Wall
displays the contents of
.I file
or, by default, its standard input, on the terminals of all
currently logged in users.
.PP
Appropriate permissions are often required to override protections
user's place on their terminals.
.SH "SEE ALSO"
mesg(1), talk(1), write(1), shutdown(8)