187 lines
2.9 KiB
HTML
187 lines
2.9 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>What is a console?</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="Remote Serial Console HOWTO"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Introduction"
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HREF="intro.html"><LINK
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REL="PREVIOUS"
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TITLE="Introduction"
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HREF="intro.html"><LINK
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REL="NEXT"
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TITLE="Why use a serial console?"
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HREF="intro-why.html"></HEAD
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><BODY
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CLASS="SECTION"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Remote Serial Console HOWTO</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="intro.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 1. Introduction</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="intro-why.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECTION"
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><H1
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CLASS="SECTION"
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><A
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NAME="INTRO-WHAT"
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></A
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>1.1. What is a console?</H1
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><P
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>The console is the text output device for system
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administration messages. These messages come from the kernel, from
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the <SPAN
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CLASS="APPLICATION"
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>init</SPAN
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> system and from the system
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logger.</P
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><P
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>On modern small computers the console is usually the
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computer's attached monitor and keyboard.</P
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><P
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>On many older computers the console is an
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<SPAN
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CLASS="ACRONYM"
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>RS-232</SPAN
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> link to a terminal such as a
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<SPAN
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CLASS="ACRONYM"
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>DEC</SPAN
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>
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<SPAN
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CLASS="PRODUCTNAME"
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><SPAN
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CLASS="ACRONYM"
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>VT100</SPAN
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></SPAN
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>. This terminal
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is in a locked room and is continually observed by the
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minicomputer's operators. Large systems from Sun, Hewlett-Packard
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and <SPAN
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CLASS="ACRONYM"
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>IBM</SPAN
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> still use serial consoles.</P
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><P
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>It is usually possible to login from the console. A login
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session from the console is treated by many parts of the operating
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system as being more trustworthy than a login session from other
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sources. Logging in as the <SPAN
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CLASS="SYSTEMITEM"
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>root</SPAN
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> super-user from the console is
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the Command Line of Last Resort when faced with a misbehaving
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system.</P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="intro.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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ACCESSKEY="H"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="intro-why.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>Introduction</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="intro.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>Why use a serial console?</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |