379 lines
5.4 KiB
HTML
379 lines
5.4 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>Re-create saved console settings</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="Reboot and test"
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HREF="test.html"><LINK
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REL="PREVIOUS"
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TITLE="Verify console operation"
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HREF="test-verify.html"><LINK
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REL="NEXT"
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TITLE="Test the console"
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HREF="test-console.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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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="test-verify.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 8. Reboot and test</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="test-console.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="RECREATE-IOCTL-SAVE"
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></A
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>8.2. Re-create saved console settings</H1
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><P
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>Log in as <SPAN
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CLASS="SYSTEMITEM"
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>root</SPAN
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> from
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the serial console and send the console into single user mode. The
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modem may hang up whilst doing this and you may need to
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re-connect.</P
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><P
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>Without a <TT
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CLASS="FILENAME"
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>/etc/ioctl.save</TT
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> containing the
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saved terminal settings, <SPAN
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CLASS="APPLICATION"
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>init</SPAN
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> assumes a
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directly attached terminal running at 9600bps with 8 data bits, no
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parity, 1 stop bit and no flow control. Configure your terminal
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with these settings.</P
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><DIV
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CLASS="INFORMALFIGURE"
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><A
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NAME="RECREATE-IOCTL-SAVE-LOGIN"
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></A
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><P
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></P
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><TABLE
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BORDER="1"
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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="SCREEN"
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><TT
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CLASS="PROMPT"
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>remote.example.edu.au ttyS0 login:</TT
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> <TT
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CLASS="USERINPUT"
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><B
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>root</B
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></TT
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>
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<TT
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CLASS="PROMPT"
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>Password:</TT
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> <TT
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CLASS="USERINPUT"
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><B
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>…</B
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></TT
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>
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<TT
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CLASS="PROMPT"
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>sh#</TT
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> <B
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CLASS="COMMAND"
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>rm -f /etc/ioctl.save</B
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>
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<TT
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CLASS="PROMPT"
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>bash#</TT
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> <B
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CLASS="COMMAND"
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>telinit 1</B
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>
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…<TT
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CLASS="COMPUTEROUTPUT"
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>Telling INIT to go to single user mode.
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INIT: Going single user
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INIT: Sending processes the TERM signal</TT
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>
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<TT
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CLASS="PROMPT"
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>sh#</TT
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> <B
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CLASS="COMMAND"
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>stty sane -parenb cs8 crtscts brkint -istrip -ixoff -ixon</B
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></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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><P
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></P
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></DIV
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><P
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>As you use <B
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CLASS="COMMAND"
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>stty</B
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> to alter the Linux's
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terminal settings remember to also alter the settings of the
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attached terminal.</P
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><P
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>Exiting from single user mode back to the default run level
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will save the serial console termnial configuration into
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<TT
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CLASS="FILENAME"
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>/etc/ioctl.save</TT
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>.</P
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><DIV
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CLASS="INFORMALFIGURE"
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><A
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NAME="RECREATE-IOCTL-SAVE-LOGIN-TEXT"
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></A
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><P
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></P
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><TABLE
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BORDER="1"
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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="SCREEN"
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><TT
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CLASS="PROMPT"
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>sh#</TT
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> <B
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CLASS="COMMAND"
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>exit</B
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>
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…
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<TT
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CLASS="PROMPT"
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>bash#</TT
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> <B
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CLASS="COMMAND"
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>ls -l /etc/ioctl.save</B
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>
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<TT
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CLASS="COMPUTEROUTPUT"
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>-rw------- 1 root root 60 Jan 1 00:00 /etc/ioctl.save</TT
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></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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><P
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></P
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></DIV
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><P
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>The terminal settings saved in
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<TT
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CLASS="FILENAME"
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>/etc/ioctl.save</TT
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> will be used if the machine
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boots into single user mode for any reason.</P
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><P
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>If your attached terminal or modem cannot alter speed to
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9600bps then the above procedure cannot be followed. <A
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HREF="http://www.aarnet.edu.au/network/software/ioctlsave/"
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TARGET="_top"
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><B
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CLASS="COMMAND"
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>ioctlsave</B
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></A
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>
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has been written for this special case. It saves the current
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terminal settings to a file in the same format as
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<TT
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CLASS="FILENAME"
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>ioctl.save</TT
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>. The procedure is shown in <A
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HREF="recreate-ioctl-save.html#RECREATE-IOCTL-SAVE-IOCTLSAVE"
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>Figure 8-1</A
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>.</P
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><DIV
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CLASS="FIGURE"
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><A
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NAME="RECREATE-IOCTL-SAVE-IOCTLSAVE"
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></A
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><P
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><B
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>Figure 8-1. Using <B
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CLASS="COMMAND"
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>ioctlsave</B
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> to create
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<TT
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CLASS="FILENAME"
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>/etc/ioctl.save</TT
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> without entering single user
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mode</B
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></P
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><TABLE
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BORDER="1"
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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="SCREEN"
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><TT
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CLASS="PROMPT"
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>remote.example.edu.au ttyS0 login:</TT
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> <TT
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CLASS="USERINPUT"
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><B
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>root</B
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></TT
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>
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<TT
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CLASS="PROMPT"
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>Password:</TT
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> <TT
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CLASS="USERINPUT"
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><B
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>…</B
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></TT
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>
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<TT
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CLASS="PROMPT"
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>bash#</TT
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> <B
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CLASS="COMMAND"
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>rm -f /etc/ioctl.save</B
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>
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<TT
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CLASS="PROMPT"
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>bash#</TT
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> <B
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CLASS="COMMAND"
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>ioctlsave -t /dev/ttyS0 /etc/ioctl.save</B
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></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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></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="test-verify.html"
|
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ACCESSKEY="P"
|
|
>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="test-console.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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>Verify console operation</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="test.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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>Test the console</TD
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></TR
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