shutdown(8) [minix man page]

SHUTDOWN(8)						      System Manager's Manual						       SHUTDOWN(8)

NAME

       shutdown - graciously close the system down

SYNOPSIS

       shutdown [-hrRmk] [-x code] [time-specification [message]]

DESCRIPTION

       Shutdown  is a program which allows a system operator to close down the system in an nice way.  Shutdown informs the users why and when the
       system is going down.  This warning is issued 10 minutes before shutdown time and every minute in the last 5 minutes.  At this time (5 min-
       utes), shutdown creates a file /etc/nologin to prevent new users from logging in.

       Shutdown keeps a logfile of shutdowns.  Every shutdown is registered in /usr/adm/wtmp, if this file exists.  After these actions, a call is
       done to reboot(2) which actually brings the system down.

       Time-specification may be something like 15:00, 15.00, +15, or now for a shutdown at 3pm (twice), 15 minutes from now, or immediately.

       The message may be used to describe why the system is going down, it may also be typed on standard input with the -m option.

OPTIONS

       -h     This flag prevents the system from rebooting after the shutdown.	The system can now be powered off.  This is the default.

       -r     This flag indicates that the system should reboot after shutting down.

       -R     Reboot the system by resetting it.  Normally the kernel will try to return to the Boot Monitor.  With -R the system will	receive  a
	      hardware reset.

       -x code
	      Halt  the  system  and  let the Monitor execute the given code as if typed at the monitor prompt.  You can for instance use -x 'boot
	      hd0' as a very fast way to reboot "from the top."

       -m     Allows the operator to type a shutdown message on standard input, that will be added to the messages displayed on all terminals.

       -k     This option gives the possibility of terminating an already started shutdown.  This is only possible if shutdown time  has  not  yet
	      arrived.

       -C     Check  if the system crashed.  This option is not used at shutdown time, but at reboot time.  It tells if the file systems should be
	      checked by testing if the last entry in the wtmp file is a shutdown entry.  (A crude replacement for a file system clean flag.)

FILES

       /usr/adm/wtmp, /etc/nologin, /usr/adm/authlog

SEE ALSO

       reboot(2), wall(1), halt(8), boot(8).

AUTHOR

       Edvard Tuinder (v892231@si.hhs.NL)

																       SHUTDOWN(8)

SHUTDOWN(8)						      System Manager's Manual						       SHUTDOWN(8)

NAME

       shutdown - close down the system at a given time

SYNOPSIS

       shutdown [ -k ] [ -r ] [ -h ] [ -f ] [ -n ] time [ warning-message ... ]

DESCRIPTION

       Shutdown  provides an automated shutdown procedure which a super-user can use to notify users nicely when the system is shutting down, sav-
       ing them from system administrators, hackers, and gurus, who would otherwise not bother with niceties.

       Time is the time at which shutdown will bring the system down and may be the word now (indicating  an  immediate  shutdown)  or	specify  a
       future time in one of two formats: +number and hour:min.  The first form brings the system down in number minutes and the second brings the
       system down at the time of day indicated (as a 24-hour clock).

       At intervals which get closer together as apocalypse approaches, warning messages are displayed at the terminals of all users on  the  sys-
       tem.   Five minutes before shutdown, or immediately if shutdown is in less than 5 minutes, logins are disabled by creating /etc/nologin and
       writing a message there.  If this file exists when a user attempts to log in, login(1) prints its contents and exits.  The file is  removed
       just before shutdown exits.

       At  shutdown  time a message is written in the system log, containing the time of shutdown, who ran shutdown and the reason.  Then a termi-
       nate signal is sent to init to bring the system down to single-user state.  Alternatively, if -r, -h, or -k was used,  then  shutdown  will
       exec  reboot(8), halt(8), or avoid shutting the system down (respectively).  (If it isn't obvious, -k is to make people think the system is
       going down!)

       With the -f option, shutdown arranges, in the manner of fastboot(8), that when the system is rebooted the file systems will not be checked.
       The -n option prevents the normal sync(2) before stopping.

       The  time  of  the shutdown and the warning message are placed in /etc/nologin and should be used to inform the users about when the system
       will be back up and why it is going down (or anything else).

FILES

       /etc/nologin   tells login not to let anyone log in

SEE ALSO

       login(1), reboot(8), fastboot(8)

BUGS

       Only allows you to kill the system between now and 23:59 if you use the absolute time for shutdown.

4th Berkeley Distribution					 November 16, 1996						       SHUTDOWN(8)