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<h1 class="SECT1"><a id="BASIC-NETWORK-COMMANDS-TALK"
name="BASIC-NETWORK-COMMANDS-TALK">13.10 Talking to Other People</a></h1>
<div class="SECT2">
<h2 class="SECT2"><a id="AEN4989" name="AEN4989">13.10.1 <tt
class="COMMAND">wall</tt></a></h2>
<p><tt class="COMMAND">wall</tt>(1) is a quick way to write a message to the users on a
system. The basic syntax is:</p>
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">wall [file]</kbd>
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<p>This will result in the contents of [file] being displayed on the terminals of all
currently logged in users. If you don't specify a file, wall will read from standard
input, so you can just type your message, and end with <b class="KEYCAP">Ctrl</b>+<b
class="KEYCAP">d</b>.</p>
<p><tt class="COMMAND">wall</tt> doesn't have many features, and apart from letting your
users know that you're about to do some serious maintenance to the system, or even reboot
it, so they have time to save their work and log off :)</p>
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<div class="SECT2">
<h2 class="SECT2"><a id="AEN5006" name="AEN5006">13.10.2 <tt
class="COMMAND">talk</tt></a></h2>
<p><tt class="COMMAND">talk</tt>(1) allows two users to chat. It splits the screen in
half, horizontally. To request a chat with another user, use this command:</p>
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">talk <person> [ttyname]</kbd>
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<div class="FIGURE"><a id="FIG-BASIC-NETWORK-COMMANDS-TALK-TALK"
name="FIG-BASIC-NETWORK-COMMANDS-TALK-TALK"></a>
<p><b>Figure 13-7. Two users in a <tt class="COMMAND">talk</tt> session</b></p>
<p><img src="basic-network-commands/talk.png" /></p>
</div>
<p>If you specify just a username, the chat request is assumed to be local, so only local
users are queried. The ttyname is required if you want to ring a user on a specific
terminal (if the user is logged in more than once). The required information for <tt
class="COMMAND">talk</tt> can be obtained from the <tt class="COMMAND">w</tt>(1)
command.</p>
<p><tt class="COMMAND">talk</tt> can also ring users on remote hosts. For the username
you simply specify an email address. <tt class="COMMAND">talk</tt> will try to contact
that remote user on that host.</p>
<p><tt class="COMMAND">talk</tt> is somewhat limited. It only supports two users and is
half-duplex.</p>
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<div class="SECT2">
<h2 class="SECT2"><a id="AEN5033" name="AEN5033">13.10.3 <tt
class="COMMAND">ytalk</tt></a></h2>
<p><tt class="COMMAND">ytalk</tt>(1) is a backwards compatible replacement for <tt
class="COMMAND">talk</tt>. It comes with Slackware as the <tt class="COMMAND">ytalk</tt>
command. The syntax is similar, but has a few differences:</p>
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<samp class="PROMPT">%</samp> <kbd
class="USERINPUT">ytalk <username>[#ttyname]</kbd>
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<div class="FIGURE"><a id="FIG-BASIC-NETWORK-COMMANDS-TALK-YTALK"
name="FIG-BASIC-NETWORK-COMMANDS-TALK-YTALK"></a>
<p><b>Figure 13-8. Two users in a <tt class="COMMAND">ytalk</tt> session</b></p>
<p><img src="basic-network-commands/ytalk.png" /></p>
</div>
<p>The username and terminal are specified the same as under talk, except you must put
them together with the hash mark (#).</p>
<p>ytalk offers several advantages:</p>
<ul>
<li>
<p>It supports more than two users.</p>
</li>
<li>
<p>A menu of options that can be brought up anytime with <kbd
class="USERINPUT">Esc</kbd>.</p>
</li>
<li>
<p>You can shell out while still in the talk session.</p>
</li>
<li>
<p>Plus more...</p>
</li>
</ul>
<p>If you're a server administrator, you'll want to make sure that the <tt
class="COMMAND">ntalk</tt> port is enabled in <tt class="FILENAME">/etc/inetd.conf</tt>.
<tt class="COMMAND">ytalk</tt> needs that to work properly.</p>
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