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BSD 4.3tahoe

.\" Copyright (c) 1980 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"	@(#)wall.1	6.1 (Berkeley) 4/29/85
.\"
.TH WALL 1 "April 29, 1985"
.UC 4
.SH NAME
wall \- write to all users
.SH SYNOPSIS
.B wall
.SH DESCRIPTION
.I Wall
reads its standard input until an end-of-file.
It then sends this message,
preceded by
`Broadcast Message ...',
to all logged in users.
.PP
The sender should be super-user to override
any protections the users may have invoked.
.SH FILES
/dev/tty?
.br
/etc/utmp
.SH "SEE ALSO"
mesg(1), write(1)
.SH DIAGNOSTICS
`Cannot send to ...' when the open on
a user's tty file fails.

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