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<!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>Serial Communications</title><meta name="GENERATOR" content="Modular DocBook HTML Stylesheet Version 1.7" /><link rel="HOME" title="FreeBSD Handbook" href="index.html" /><link rel="UP" title="Network Communication" href="network-communication.html" /><link rel="PREVIOUS" title="Network Communication" href="network-communication.html" /><link rel="NEXT" title="Introduction" href="serial.html" /><link rel="STYLESHEET" type="text/css" href="docbook.css" /></head><body class="CHAPTER" 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">FreeBSD Handbook</th></tr><tr><td width="10%" align="left" valign="bottom"><a href="network-communication.html"accesskey="P">Prev</a></td><td width="80%" align="center" valign="bottom"></td><td width="10%" align="right" valign="bottom"><a href="serial.html"accesskey="N">Next</a></td></tr></table><hr align="LEFT" width="100%" /></div><div class="CHAPTER"><h1><a id="SERIALCOMMS" name="SERIALCOMMS"></a>Chapter 20 Serial Communications</h1><div class="TOC"><dl><dt><b>Table of Contents</b></dt><dt>20.1 <a href="serialcomms.html#SERIAL-SYNOPSIS">Synopsis</a></dt><dt>20.2 <a href="serial.html">Introduction</a></dt><dt>20.3 <a href="term.html">Terminals</a></dt><dt>20.4 <a href="dialup.html">Dial-in Service</a></dt><dt>20.5 <a href="dialout.html">Dial-out Service</a></dt><dt>20.6 <a href="serialconsole-setup.html">Setting Up the Serial Console</a></dt></dl></div><div class="SECT1"><h1 class="SECT1"><a id="SERIAL-SYNOPSIS" name="SERIAL-SYNOPSIS">20.1 Synopsis</a></h1><p><span class="TRADEMARK">UNIX</span>® has always had support for serialcommunications. In fact, the very first <span class="TRADEMARK">UNIX</span> machinesrelied on serial lines for user input and output. Things have changed a lot from the dayswhen the average ``terminal'' consisted of a 10-character-per-second serial printer and akeyboard. This chapter will cover some of the ways in which FreeBSD uses serialcommunications.</p><p>After reading this chapter, you will know:</p><ul><li><p>How to connect terminals to your FreeBSD system.</p></li><li><p>How to use a modem to dial out to remote hosts.</p></li><li><p>How to allow remote users to login to your system with a modem.</p></li><li><p>How to boot your system from a serial console.</p></li></ul><p>Before reading this chapter, you should:</p><ul><li><p>Know how to configure and install a new kernel (<a href="kernelconfig.html">Chapter8</a>).</p></li><li><p>Understand <span class="TRADEMARK">UNIX</span> permissions and processes (<ahref="basics.html">Chapter 3</a>).</p></li><li><p>Have access to the technical manual for the serial hardware (modem or multi-port card)that you would like to use with FreeBSD.</p></li></ul></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="network-communication.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="serial.html"accesskey="N">Next</a></td></tr><tr><td width="33%" align="left" valign="top">Network Communication</td><td width="34%" align="center" valign="top"><a href="network-communication.html"accesskey="U">Up</a></td><td width="33%" align="right" valign="top">Introduction</td></tr></table></div><p align="center"><small>This, and other documents, can be downloaded from <ahref="ftp://ftp.FreeBSD.org/pub/FreeBSD/doc/">ftp://ftp.FreeBSD.org/pub/FreeBSD/doc/</a>.</small></p><p align="center"><small>For questions about FreeBSD, read the <ahref="http://www.FreeBSD.org/docs.html">documentation</a> before contacting <<ahref="mailto:questions@FreeBSD.org">questions@FreeBSD.org</a>>.<br />For questions about this documentation, e-mail <<ahref="mailto:doc@FreeBSD.org">doc@FreeBSD.org</a>>.</small></p></body></html>⌨️ 快捷键说明
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