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+<!DOCTYPE HTML PUBLIC "-//Norman Walsh//DTD DocBook HTML 1.0//EN">
+<HTML
+><HEAD
+><TITLE
+>Special configuration in /etc/inittab</TITLE
+><META
+NAME="GENERATOR"
+CONTENT="Modular DocBook HTML Stylesheet"><LINK
+REL="HOME"
+TITLE="The Linux System Administrators' Guide"
+HREF="book1.html"><LINK
+REL="UP"
+TITLE="init"
+HREF="c1705.html"><LINK
+REL="PREVIOUS"
+TITLE="Run levels"
+HREF="x1812.html"><LINK
+REL="NEXT"
+TITLE="Booting in single user mode"
+HREF="x1880.html"></HEAD
+><BODY
+BGCOLOR="#FFFFFF"
+TEXT="#000000"
+><DIV
+CLASS="NAVHEADER"
+><TABLE
+WIDTH="100%"
+BORDER="0"
+CELLPADDING="0"
+CELLSPACING="0"
+><TR
+><TH
+COLSPAN="3"
+ALIGN="center"
+>The Linux System Administrators' Guide</TH
+></TR
+><TR
+><TD
+WIDTH="10%"
+ALIGN="left"
+VALIGN="bottom"
+><A
+HREF="x1812.html"
+>Prev</A
+></TD
+><TD
+WIDTH="80%"
+ALIGN="center"
+VALIGN="bottom"
+>Chapter 7. <B
+CLASS="COMMAND"
+>init</B
+></TD
+><TD
+WIDTH="10%"
+ALIGN="right"
+VALIGN="bottom"
+><A
+HREF="x1880.html"
+>Next</A
+></TD
+></TR
+></TABLE
+><HR
+ALIGN="LEFT"
+WIDTH="100%"></DIV
+><DIV
+CLASS="SECT1"
+><H1
+CLASS="SECT1"
+><A
+NAME="AEN1852"
+>Special configuration in <TT
+CLASS="FILENAME"
+>/etc/inittab</TT
+></A
+></H1
+><P
+>The <TT
+CLASS="FILENAME"
+>/etc/inittab</TT
+> has some special
+ features that allow <B
+CLASS="COMMAND"
+>init</B
+> to react to special
+ circumstances. These special features are marked by special
+ keywords in the third field. Some examples:
+
+ <DIV
+CLASS="GLOSSLIST"
+><DL
+><DT
+><B
+><TT
+CLASS="LITERAL"
+>powerwait</TT
+></B
+></DT
+><DD
+><P
+> Allows <B
+CLASS="COMMAND"
+>init</B
+> to shut the system
+ down, when the power fails. This assumes the use of
+ a UPS, and software that watches the UPS and informs
+ <B
+CLASS="COMMAND"
+>init</B
+> that the power is off.
+ </P
+></DD
+><DT
+><B
+><TT
+CLASS="LITERAL"
+>ctrlaltdel</TT
+></B
+></DT
+><DD
+><P
+> Allows <B
+CLASS="COMMAND"
+>init</B
+> to reboot the system, when
+ the user presses ctrl-alt-del on the console keyboard.
+ Note that the system administrator can configure the
+ reaction to ctrl-alt-del to be something else instead,
+ e.g., to be ignored, if the system is in a public
+ location. (Or to start <B
+CLASS="COMMAND"
+>nethack</B
+>.)
+ </P
+></DD
+><DT
+><B
+><TT
+CLASS="LITERAL"
+>sysinit</TT
+></B
+></DT
+><DD
+><P
+> Command to be run when the system is booted. This command
+ usually cleans up <TT
+CLASS="FILENAME"
+>/tmp</TT
+>, for example.
+ </P
+></DD
+></DL
+></DIV
+>
+
+ The list above is not exhaustive. See your
+ <TT
+CLASS="FILENAME"
+>inittab</TT
+> manual page for all possibilities,
+ and for details on how to use the above ones. </P
+></DIV
+><DIV
+CLASS="NAVFOOTER"
+><HR
+ALIGN="LEFT"
+WIDTH="100%"><TABLE
+WIDTH="100%"
+BORDER="0"
+CELLPADDING="0"
+CELLSPACING="0"
+><TR
+><TD
+WIDTH="33%"
+ALIGN="left"
+VALIGN="top"
+><A
+HREF="x1812.html"
+>Prev</A
+></TD
+><TD
+WIDTH="34%"
+ALIGN="center"
+VALIGN="top"
+><A
+HREF="book1.html"
+>Home</A
+></TD
+><TD
+WIDTH="33%"
+ALIGN="right"
+VALIGN="top"
+><A
+HREF="x1880.html"
+>Next</A
+></TD
+></TR
+><TR
+><TD
+WIDTH="33%"
+ALIGN="left"
+VALIGN="top"
+>Run levels</TD
+><TD
+WIDTH="34%"
+ALIGN="center"
+VALIGN="top"
+><A
+HREF="c1705.html"
+>Up</A
+></TD
+><TD
+WIDTH="33%"
+ALIGN="right"
+VALIGN="top"
+>Booting in single user mode</TD
+></TR
+></TABLE
+></DIV
+></BODY
+></HTML
+> \ No newline at end of file