usr/src/usr.bin/wall/wall.1

.\" Copyright (c) 1989, 1990 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" %sccs.include.redist.roff%
.\"
.\"     @(#)wall.1      6.5 (Berkeley) %G%
.\"
.Dd
.Dt WALL 1
.Os BSD 4
.Sh NAME
.Nm wall
.Nd write a message to users
.Sh SYNOPSIS
.Nm wall
.Op Ar file
.Sh DESCRIPTION
.Nm Wall
displays the contents of
.Ar file
or, by default, its standard input, on the terminals of all
currently logged in users.
.Pp
Only the super-user can write on the
terminals of users who have chosen
to deny messages or are using a program which
automatically denies messages.
.Sh SEE ALSO
.Xr mesg 1 ,
.Xr talk 1 ,
.Xr write 1 ,
.Xr shutdown 8
.Sh HISTORY
A
.Nm
command appeared in
.At v7 .