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+.\" Copyright (c) 1989, 1990 The Regents of the University of California.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)wall.1	6.5 (Berkeley) 4/23/91
+.\"
+.\" Modified for Linux, Mon Mar  8 18:07:38 1993, faith@cs.unc.edu
+.\"
+.TH WALL "1" "September 2011" "util-linux" "User Commands"
+.SH NAME
+wall \- write a message to users
+.SH SYNOPSIS
+.B wall
+[-n] [-t TIMEOUT] [file]
+.SH DESCRIPTION
+.B Wall
+displays the contents of
+.I file
+or, by default, its standard input, on the terminals of all currently logged
+in users.  The command will cut over 79 character long lines to new lines.
+Short lines are white space padded to have 79 characters.  The command will
+always put carriage return and new line at the end of each line.
+.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.
+.PP
+Reading from a file is refused when the invoker is not superuser and the
+program is suid or sgid.
+.SH OPTIONS
+.TP
+\fB\-n\fR, \fB\-\-nobanner\fR
+Suppress banner
+.TP
+\fB\-t\fR, \fB\-\-timeout\fR \fItimeout\fR
+Write
+.I timeout
+to terminals in seconds.  Argument must be positive integer.  Default value
+is 300 seconds, which is a legacy from time when people ran terminals over
+modem lines.
+.TP
+\fB\-V\fR, \fB\-\-version\fR
+Output version and exit.
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+Output help and exit.
+.SH SEE ALSO
+.BR mesg (1),
+.BR talk (1),
+.BR write (1),
+.BR shutdown (8)
+.SH HISTORY
+A
+.B wall
+command appeared in Version 7 AT&T UNIX.
+.SH AVAILABILITY
+The wall command is part of the util-linux package and is available from
+.UR ftp://\:ftp.kernel.org\:/pub\:/linux\:/utils\:/util-linux/
+Linux Kernel Archive
+.UE .