126 lines
3.5 KiB
HTML
126 lines
3.5 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>shutdown(8)</TITLE>
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</HEAD>
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<BODY>
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<H1>shutdown(8)</H1>
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<HR>
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<PRE>
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</PRE>
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<H2>NAME</H2><PRE>
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shutdown - graciously close the system down
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</PRE>
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<H2>SYNOPSIS</H2><PRE>
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<STRONG>shutdown</STRONG> [<STRONG>-hrRmk</STRONG>] [<STRONG>-x</STRONG> <EM>code</EM>] [<EM>time</EM>-<EM>specification</EM> [<EM>message</EM>]]
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</PRE>
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<H2>DESCRIPTION</H2><PRE>
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<STRONG>Shutdown</STRONG> is a program which allows a system operator to close down the
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system in an nice way. <STRONG>Shutdown</STRONG> informs the users why and when the system
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is going down. This warning is issued 10 minutes before shutdown time
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and every minute in the last 5 minutes. At this time (5 minutes),
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<STRONG>shutdown</STRONG> creates a file <STRONG>/etc/nologin</STRONG> to prevent new users from logging
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in.
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<STRONG>Shutdown</STRONG> keeps a logfile of shutdowns. Every shutdown is registered in
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<STRONG>/usr/adm/wtmp</STRONG>, if this file exists. After these actions, a call is done
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to <STRONG><A HREF="../man2/reboot.2.html">reboot(2)</A></STRONG> which actually brings the system down.
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<EM>Time</EM>-<EM>specification</EM> may be something like <STRONG>15:00</STRONG>, <STRONG>15.00</STRONG>, <STRONG>+15</STRONG>, or <STRONG>now</STRONG> for a
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shutdown at 3pm (twice), 15 minutes from now, or immediately.
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The message may be used to describe why the system is going down, it may
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also be typed on standard input with the <STRONG>-m</STRONG> option.
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</PRE>
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<H2>OPTIONS</H2><PRE>
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<STRONG>-h</STRONG> This flag prevents the system from rebooting after the shutdown.
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The system can now be powered off. This is the default.
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<STRONG>-r</STRONG> This flag indicates that the system should reboot after shutting
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down.
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<STRONG>-R</STRONG> Reboot the system by resetting it. Normally the kernel will try to
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return to the Boot Monitor. With <STRONG>-R</STRONG> the system will receive a
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hardware reset.
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<STRONG>-x</STRONG> <EM>code</EM>
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Halt the system and let the Monitor execute the given code as if
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typed at the monitor prompt. You can for instance use <STRONG>-x</STRONG> <STRONG>'boot</STRONG> <STRONG>hd0'</STRONG>
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as a very fast way to reboot "from the top."
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<STRONG>-m</STRONG> Allows the operator to type a shutdown message on standard input,
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that will be added to the messages displayed on all terminals.
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<STRONG>-k</STRONG> This option gives the possibility of terminating an already started
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shutdown. This is only possible if shutdown time has not yet
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arrived.
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<STRONG>-C</STRONG> Check if the system crashed. This option is not used at shutdown
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time, but at reboot time. It tells if the file systems should be
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checked by testing if the last entry in the wtmp file is a shutdown
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entry. (A crude replacement for a file system clean flag.)
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</PRE>
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<H2>FILES</H2><PRE>
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/usr/adm/wtmp, /etc/nologin, /usr/adm/authlog
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</PRE>
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<H2>SEE ALSO</H2><PRE>
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<STRONG><A HREF="../man2/reboot.2.html">reboot(2)</A></STRONG>, <STRONG><A HREF="../man1/wall.1.html">wall(1)</A></STRONG>, <STRONG><A HREF="../man8/halt.8.html">halt(8)</A></STRONG>, <STRONG><A HREF="../man8/boot.8.html">boot(8)</A></STRONG>.
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</PRE>
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<H2>AUTHOR</H2><PRE>
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Edvard Tuinder (v892231@si.hhs.NL)
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</PRE>
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</BODY>
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</HTML>
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