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Mon Apr 25 13:37:00 UTC 2011 Slackware 13.37 x86_64 stable is released! Thanks to everyone who pitched in on this release: the Slackware team, the folks producing upstream code, and linuxquestions.org for providing a great forum for collaboration and testing. The ISOs are off to be replicated, a 6 CD-ROM 32-bit set and a dual-sided 32-bit/64-bit x86/x86_64 DVD. Please consider supporting the Slackware project by picking up a copy from store.slackware.com. We're taking pre-orders now, and offer a discount if you sign up for a subscription. As always, thanks to the Slackware community for testing, suggestions, and feedback. :-) Have fun!
142 lines
5.3 KiB
HTML
142 lines
5.3 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta name="generator" content="HTML Tidy, see www.w3.org" />
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<title>Basic Network Commands</title>
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alink="#0000FF">
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<table summary="Header navigation table" width="100%" border="0" cellpadding="0"
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cellspacing="0">
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<tr>
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<th colspan="3" align="center">Slackware Linux Essentials</th>
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</div>
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<div class="CHAPTER">
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<h1><a id="BASIC-NETWORK-COMMANDS" name="BASIC-NETWORK-COMMANDS"></a>Chapter 13 Basic
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Network Commands</h1>
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<div class="TOC">
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<dl>
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<dt><b>Table of Contents</b></dt>
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<dt>13.1 <a href="basic-network-commands.html#BASIC-NETWORK-COMMANDS-PING"><tt
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class="COMMAND">ping</tt></a></dt>
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<dt>13.2 <a href="basic-network-commands-traceroute.html"><tt
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class="COMMAND">traceroute</tt></a></dt>
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<dt>13.3 <a href="basic-network-commands-dns.html">DNS Tools</a></dt>
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<dt>13.4 <a href="basic-network-commands-finger.html"><tt
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class="COMMAND">finger</tt></a></dt>
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<dt>13.5 <a href="basic-network-commands-telnet.html"><tt
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class="COMMAND">telnet</tt></a></dt>
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<dt>13.6 <a href="basic-network-commands-ssh.html">The Secure shell</a></dt>
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<dt>13.7 <a href="basic-network-commands-email.html">email</a></dt>
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<dt>13.8 <a href="basic-network-commands-web.html">Browsers</a></dt>
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<dt>13.9 <a href="basic-network-commands-ftp.html">FTP Clients</a></dt>
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<dt>13.10 <a href="basic-network-commands-talk.html">Talking to Other People</a></dt>
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</dl>
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</div>
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<p>A network consists of several computers connected together. The network can be as
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simple as a few computers connected in your home or office, or as complicated as a large
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university network or even the entire Internet. When your computer is part of a network,
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you have access to those systems either directly or through services like mail and the
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web.</p>
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<p>There are a variety of networking programs that you can use. Some are handy for
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performing diagnostics to see if everything is working properly. Others (like mail
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readers and web browsers) are useful for getting your work done and staying in contact
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with other people.</p>
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<div class="SECT1">
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<h1 class="SECT1"><a id="BASIC-NETWORK-COMMANDS-PING"
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name="BASIC-NETWORK-COMMANDS-PING">13.1 <tt class="COMMAND">ping</tt></a></h1>
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<p><tt class="COMMAND">ping</tt>(8) sends an ICMP <var class="LITERAL">ECHO_REQUEST</var>
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packet to the specified host. If the host responds, you get an ICMP packet back. Sound
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strange? Well, you can “ping” an IP address to see if a machine is alive. If
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there is no response, you know something is wrong. Here is an example conversation
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between two Linux users:</p>
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<a id="AEN4428" name="AEN4428"></a>
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<blockquote class="BLOCKQUOTE">
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<p class="LITERALLAYOUT"><span class="emphasis"><i class="EMPHASIS">User
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A</i></span>: Loki's down again.<br />
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<span class="emphasis"><i class="EMPHASIS">User
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B</i></span>: Are you sure?<br />
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<span class="emphasis"><i class="EMPHASIS">User
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A</i></span>: Yeah, I tried pinging it, but there's no response.</p>
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</blockquote>
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<p>It's instances like these that make <tt class="COMMAND">ping</tt> a very useful
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day-to-day command. It provides a very quick way to see if a machine is up and connected
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to the network. The basic syntax is:</p>
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<table border="0" bgcolor="#E0E0E0" width="100%">
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<tr>
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<td>
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<pre class="SCREEN">
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<samp class="PROMPT">%</samp> <kbd class="USERINPUT">ping www.slackware.com</kbd>
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</pre>
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</td>
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</tr>
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</table>
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<p>There are, of course, several options that can be specified. Check the <tt
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class="COMMAND">ping</tt>(1) man page for more information.</p>
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</div>
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accesskey="P">Prev</a></td>
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accesskey="H">Home</a></td>
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<td width="33%" align="left" valign="top">Shutting Down Properly</td>
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<td width="34%" align="center" valign="top"> </td>
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