313 lines
4.6 KiB
HTML
313 lines
4.6 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>agetty</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="Configure getty"
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HREF="getty.html"><LINK
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REL="PREVIOUS"
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TITLE="Traditional getty"
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HREF="getty-getty.html"><LINK
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REL="NEXT"
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TITLE="mgetty"
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HREF="getty-mgetty.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="getty-getty.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 6. Configure <SPAN
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CLASS="PRODUCTNAME"
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>getty</SPAN
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></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="getty-mgetty.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="GETTY-AGETTY"
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></A
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>6.3. <SPAN
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CLASS="PRODUCTNAME"
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>agetty</SPAN
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></H1
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><P
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><SPAN
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CLASS="APPLICATION"
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>agetty</SPAN
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> is an <SPAN
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CLASS="QUOTE"
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>"alternative
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getty"</SPAN
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>. It takes all of its parameters on the command line,
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with no use of <TT
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CLASS="FILENAME"
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>/etc/gettydefs</TT
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> or any other
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configuration file. <SPAN
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CLASS="APPLICATION"
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>agetty</SPAN
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> is
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documented in the manual page
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<I
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CLASS="CITETITLE"
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>agetty(8)</I
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>.</P
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><P
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><A
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HREF="getty-agetty.html#GETTY-AGETTY-INITTAB"
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>Figure 6-6</A
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> shows how to invoke
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<SPAN
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CLASS="APPLICATION"
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>agetty</SPAN
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> for use with a serial
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console.</P
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><DIV
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CLASS="FIGURE"
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><A
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NAME="GETTY-AGETTY-INITTAB"
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></A
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><P
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><B
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>Figure 6-6. <TT
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CLASS="FILENAME"
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>/etc/inittab</TT
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> entry for
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<SPAN
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CLASS="APPLICATION"
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>agetty</SPAN
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></B
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></P
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><TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="PROGRAMLISTING"
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>co:2345:respawn:/sbin/agetty -h -t 60 ttyS0 9600 vt102</PRE
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></FONT
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></TD
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></TR
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></TABLE
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></DIV
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><P
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><TT
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CLASS="LITERAL"
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>ttyS0</TT
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> refers to the serial device
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<TT
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CLASS="FILENAME"
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>/dev/ttyS0</TT
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>.</P
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><P
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><TT
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CLASS="LITERAL"
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>9600</TT
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> is the bits per second of the serial
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link. agetty will support multiple values, using the modem's
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<TT
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CLASS="LITERAL"
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>CONNECT</TT
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> message or the <SPAN
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CLASS="ACRONYM"
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>RS-232</SPAN
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>
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Break signal to select between them. Only use one value, as serial
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consoles only have only one data rate.</P
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><P
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><TT
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CLASS="LITERAL"
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>vt102</TT
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> sets the <TT
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CLASS="VARNAME"
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>TERM</TT
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>
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environment variable to indicate that a
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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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> terminal is
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connecting.</P
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><P
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><TT
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CLASS="LITERAL"
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>-h</TT
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> activates CTS/RTS handshaking.</P
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><P
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><TT
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CLASS="LITERAL"
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>-t 60</TT
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> allows 60 seconds for someone to
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attempt to log in before the modem is hung up. You should test
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this feature to ensure that <SPAN
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CLASS="APPLICATION"
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>init</SPAN
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> is not
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restarting <SPAN
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CLASS="APPLICATION"
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>agetty</SPAN
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> every 60 seconds when
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the link is idle. Look for a continually changing process
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identifier for <SPAN
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CLASS="APPLICATION"
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>agetty</SPAN
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>.</P
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><P
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><SPAN
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CLASS="APPLICATION"
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>agetty</SPAN
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> uses escape sequences in
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<TT
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CLASS="FILENAME"
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>/etc/issue</TT
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> to insert information. For
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example, <TT
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CLASS="LITERAL"
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>\n.\o \l</TT
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> will appear as
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<TT
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CLASS="LITERAL"
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>remote.example.edu.au ttyS0</TT
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>.</P
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><P
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>When you log out <SPAN
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CLASS="APPLICATION"
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>agetty</SPAN
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> does not
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appear to lower the Data Terminal Ready signal to force the modme
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to hang up. If having people automatically disconnected at the end
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of their login session matters to you then you might consider
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<SPAN
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CLASS="APPLICATION"
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>mgetty</SPAN
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> instead.</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="getty-getty.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="getty-mgetty.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%"
|
|
ALIGN="left"
|
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VALIGN="top"
|
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>Traditional <SPAN
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CLASS="PRODUCTNAME"
|
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>getty</SPAN
|
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></TD
|
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><TD
|
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WIDTH="34%"
|
|
ALIGN="center"
|
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VALIGN="top"
|
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><A
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HREF="getty.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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><SPAN
|
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CLASS="PRODUCTNAME"
|
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>mgetty</SPAN
|
|
></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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> |