143 lines
3.3 KiB
HTML
143 lines
3.3 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of WALL</TITLE>
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</HEAD><BODY>
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<H1>WALL</H1>
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Section: User Commands (1)<BR>Updated: August 2013<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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wall - write a message to all users
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>wall</B>
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[<B>-n</B>]
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[<B>-t</B>
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<I>timeout</I>]
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[<B>-g</B>
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<I>group</I>]
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[<I>message</I> | <I>file</I>]
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<B>wall</B>
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displays a
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<I>message</I>,
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or the contents of a
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<I>file</I>,
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or otherwise its standard input, on the terminals of all currently logged
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in users. The command will wrap lines that are longer than 79 characters.
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Short lines are whitespace padded to have 79 characters. The command will
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always put a carriage return and new line at the end of each line.
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<P>
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Only the superuser can write on the terminals of users who have chosen to
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deny messages or are using a program which automatically denies messages.
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<P>
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Reading from a
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<I>file</I>
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is refused when the invoker is not superuser and the program is
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set-user-ID or set-group-ID.
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<A NAME="lbAE"> </A>
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<H2>OPTIONS</H2>
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<DL COMPACT>
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<DT id="1"><B>-n</B>,<B> --nobanner</B>
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<DD>
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Suppress the banner.
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<DT id="2"><B>-t</B>,<B> --timeout </B><I>timeout</I>
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<DD>
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Abandon the write attempt to the terminals after <I>timeout</I> seconds.
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This <I>timeout</I> must be a positive integer. The default value
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is 300 seconds, which is a legacy from the time when people ran terminals over
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modem lines.
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<DT id="3"><B>-g</B>,<B> --group </B><I>group</I>
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<DD>
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Limit printing message to members of group defined as a
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<I>group</I>
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argument. The argument can be group name or GID.
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<DT id="4"><B>-V</B>,<B> --version</B>
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<DD>
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Display version information and exit.
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<DT id="5"><B>-h</B>,<B> --help</B>
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<DD>
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Display help text and exit.
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</DL>
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<A NAME="lbAF"> </A>
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<H2>NOTES</H2>
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Some sessions, such as wdm, that have in the beginning of
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<B><A HREF="/cgi-bin/man/man2html?5+utmp">utmp</A></B>(5)
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ut_type data a ':' character will not get the message from
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<B>wall</B>.
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This is done to avoid write errors.
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<A NAME="lbAG"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?1+mesg">mesg</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?1+talk">talk</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?1+write">write</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?8+shutdown">shutdown</A></B>(8)
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<A NAME="lbAH"> </A>
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<H2>HISTORY</H2>
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A
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<B>wall</B>
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command appeared in Version 7 AT&T UNIX.
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<A NAME="lbAI"> </A>
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<H2>AVAILABILITY</H2>
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The wall command is part of the util-linux package and is available from
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Linux Kernel Archive
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="6"><A HREF="#lbAB">NAME</A><DD>
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<DT id="7"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="8"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="9"><A HREF="#lbAE">OPTIONS</A><DD>
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<DT id="10"><A HREF="#lbAF">NOTES</A><DD>
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<DT id="11"><A HREF="#lbAG">SEE ALSO</A><DD>
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<DT id="12"><A HREF="#lbAH">HISTORY</A><DD>
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<DT id="13"><A HREF="#lbAI">AVAILABILITY</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:29 GMT, March 31, 2021
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</BODY>
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</HTML>
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