diff options
| author |   Patrick J Volkerding <volkerdi@slackware.com> | 2009-08-26 10:00:38 -0500 |
|---|---|---|
| committer |   Eric Hameleers <alien@slackware.com> | 2018-05-31 22:41:17 +0200 |
| commit | 5a12e7c134274dba706667107d10d231517d3e05 (patch) | |
| tree | 55718d5acb710fde798d9f38d0bbaf594ed4b296 /slackbook/html/basic-network-commands-telnet.html | |
| download | current-5a12e7c134274dba706667107d10d231517d3e05.tar.gz current-5a12e7c134274dba706667107d10d231517d3e05.tar.xz | |
Slackware 13.0slackware-13.0
Wed Aug 26 10:00:38 CDT 2009
Slackware 13.0 x86_64 is released as stable! Thanks to everyone who
helped make this release possible -- see the RELEASE_NOTES for the
credits. The ISOs are off to the replicator. This time it will be a
6 CD-ROM 32-bit set and a dual-sided 32-bit/64-bit x86/x86_64 DVD.
We're taking pre-orders now at store.slackware.com. Please consider
picking up a copy to help support the project. Once again, thanks to
the entire Slackware community for all the help testing and fixing
things and offering suggestions during this development cycle.
As always, have fun and enjoy! -P.
Diffstat (limited to 'slackbook/html/basic-network-commands-telnet.html')
| -rw-r--r-- | slackbook/html/basic-network-commands-telnet.html | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/slackbook/html/basic-network-commands-telnet.html b/slackbook/html/basic-network-commands-telnet.html new file mode 100644 index 000000000..736a26486 --- /dev/null +++ b/slackbook/html/basic-network-commands-telnet.html @@ -0,0 +1,173 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" + "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml"> +<head> +<meta name="generator" content="HTML Tidy, see www.w3.org" /> +<title>telnet</title> +<meta name="GENERATOR" content="Modular DocBook HTML Stylesheet Version 1.7" /> +<link rel="HOME" title="Slackware Linux Essentials" href="index.html" /> +<link rel="UP" title="Basic Network Commands" href="basic-network-commands.html" /> +<link rel="PREVIOUS" title="finger" href="basic-network-commands-finger.html" /> +<link rel="NEXT" title="The Secure shell" href="basic-network-commands-ssh.html" /> +<link rel="STYLESHEET" type="text/css" href="docbook.css" /> +<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> +</head> +<body class="SECT1" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#840084" +alink="#0000FF"> +<div class="NAVHEADER"> +<table summary="Header navigation table" width="100%" border="0" cellpadding="0" +cellspacing="0"> +<tr> +<th colspan="3" align="center">Slackware Linux Essentials</th> +</tr> + +<tr> +<td width="10%" align="left" valign="bottom"><a href="basic-network-commands-finger.html" +accesskey="P">Prev</a></td> +<td width="80%" align="center" valign="bottom">Chapter 13 Basic Network Commands</td> +<td width="10%" align="right" valign="bottom"><a href="basic-network-commands-ssh.html" +accesskey="N">Next</a></td> +</tr> +</table> + +<hr align="LEFT" width="100%" /> +</div> + +<div class="SECT1"> +<h1 class="SECT1"><a id="BASIC-NETWORK-COMMANDS-TELNET" +name="BASIC-NETWORK-COMMANDS-TELNET">13.5 <tt class="COMMAND">telnet</tt></a></h1> + +<p>Someone once stated that <tt class="COMMAND">telnet</tt>(1) was the coolest thing he +had ever seen on computers. The ability to remotely log in and do stuff on another +computer is what separates Unix and Unix-like operating systems from other operating +systems.</p> + +<p><tt class="COMMAND">telnet</tt> allows you to log in to a computer, just as if you +were sitting at the terminal. Once your username and password are verified, you are given +a shell prompt. From here, you can do anything requiring a text console. Compose email, +read newsgroups, move files around, and so on. If you are running X and you <tt +class="COMMAND">telnet</tt> to another machine, you can run X programs on the remote +computer and display them on yours.</p> + +<p>To login to a remote machine, use this syntax:</p> + +<table border="0" bgcolor="#E0E0E0" width="100%"> +<tr> +<td> +<pre class="SCREEN"> +<samp class="PROMPT">%</samp> <kbd class="USERINPUT">telnet <<var +class="REPLACEABLE">hostname</var>></kbd> +</pre> +</td> +</tr> +</table> + +<p>If the host responds, you will receive a login prompt. Give it your username and +password. That's it. You are now at a shell. To quit your telnet session, use either the +<tt class="COMMAND">exit</tt> command or the <tt class="COMMAND">logout</tt> command.</p> + +<div class="WARNING"> +<table class="WARNING" width="100%" border="0"> +<tr> +<td width="25" align="CENTER" valign="TOP"><img src="./imagelib/admon/warning.png" +hspace="5" alt="Warning" /></td> +<td align="LEFT" valign="TOP"> +<p><tt class="COMMAND">telnet</tt> does not encrypt the information it sends. Everything +is sent in plain text, even passwords. It is not advisable to use <tt +class="COMMAND">telnet</tt> over the Internet. Instead, consider the <tt +class="COMMAND">Secure Shell</tt>. It encrypts all traffic and is available for free.</p> +</td> +</tr> +</table> +</div> + +<div class="SECT2"> +<h2 class="SECT2"><a id="AEN4593" name="AEN4593">13.5.1 The other use of telnet</a></h2> + +<p>Now that we have convinced you not to use the telnet protocol anymore to log into a +remote machine, we'll show you a couple of useful ways to use <tt +class="COMMAND">telnet</tt>.</p> + +<p>You can also use the <tt class="COMMAND">telnet</tt> command to connect to a host on a +certain port.</p> + +<table border="0" bgcolor="#E0E0E0" width="100%"> +<tr> +<td> +<pre class="SCREEN"> +<samp class="PROMPT">%</samp> <kbd class="USERINPUT">telnet <<var +class="REPLACEABLE">hostname</var>> [port]</kbd> +</pre> +</td> +</tr> +</table> + +<p>This can be quite handy when you quickly need to test a certain service, and you need +full control over the commands, and you need to see what exactly is going on. You can +interactively test or use an SMTP server, a POP3 server, an HTTP server, etc. this +way.</p> + +<p>In the next figure you'll see how you can <tt class="COMMAND">telnet</tt> to a HTTP +server on port 80, and get some basic information from it.</p> + +<div class="FIGURE"><a id="FIG-BASIC-NETWORK-COMMANDS-TELNET-WEB" +name="FIG-BASIC-NETWORK-COMMANDS-TELNET-WEB"></a> +<p><b>Figure 13-1. Telnetting to a webserver</b></p> + +<table border="0" bgcolor="#E0E0E0" width="100%"> +<tr> +<td> +<pre class="SCREEN"> +<samp class="PROMPT">%</samp> <kbd class="USERINPUT">telnet store.slackware.com 80</kbd> +Trying 69.50.233.153... +Connected to store.slackware.com. +Escape character is '^]'. +HEAD / HTTP/1.0 + +HTTP/1.1 200 OK +Date: Mon, 25 Apr 2005 20:47:01 GMT +Server: Apache/1.3.33 (Unix) mod_ssl/2.8.22 OpenSSL/0.9.7d +Last-Modified: Fri, 18 Apr 2003 10:58:54 GMT +ETag: "193424-c0-3e9fda6e" +Accept-Ranges: bytes +Content-Length: 192 +Connection: close +Content-Type: text/html + +Connection closed by foreign host. +<samp class="PROMPT">%</samp> +</pre> +</td> +</tr> +</table> +</div> + +<p>You can do the same for other plain-text protocols, as long as you know what port to +connect to, and what the commands are.</p> +</div> +</div> + +<div class="NAVFOOTER"> +<hr align="LEFT" width="100%" /> +<table summary="Footer navigation table" width="100%" border="0" cellpadding="0" +cellspacing="0"> +<tr> +<td width="33%" align="left" valign="top"><a href="basic-network-commands-finger.html" +accesskey="P">Prev</a></td> +<td width="34%" align="center" valign="top"><a href="index.html" +accesskey="H">Home</a></td> +<td width="33%" align="right" valign="top"><a href="basic-network-commands-ssh.html" +accesskey="N">Next</a></td> +</tr> + +<tr> +<td width="33%" align="left" valign="top"><tt class="COMMAND">finger</tt></td> +<td width="34%" align="center" valign="top"><a href="basic-network-commands.html" +accesskey="U">Up</a></td> +<td width="33%" align="right" valign="top">The Secure shell</td> +</tr> +</table> +</div> +</body> +</html> + |