.\" Copyright (c) 1989, 1990, 1993 .\" 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 8.1 (Berkeley) 6/6/93 .\" $FreeBSD: src/usr.bin/wall/wall.1,v 1.11 2004/07/17 04:15:27 tjr Exp $ .\" .Dd July 17, 2004 .Dt WALL 1 .Os .Sh NAME .Nm wall .Nd write a message to users .Sh SYNOPSIS .Nm .Op Fl g Ar group .Op Ar file .Sh DESCRIPTION The .Nm utility 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. .Bl -tag -width indent .It Fl g Send messages to users in this group. This option may be specified multiple times, and any user in any of the specified groups will receive the message. .El .Sh SEE ALSO .Xr mesg 1 , .Xr talk 1 , .Xr write 1 , .Xr shutdown 8 .Sh HISTORY A .Nm command appeared in PWB UNIX. .Sh BUGS The sender's .Ev LC_CTYPE setting is used to determine which characters are safe to write to a terminal, not the receiver's (which .Nm has no way of knowing). .Pp The .Nm utility does not recognize multibyte characters.