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