SHUTDOWN(8)SHUTDOWN(8)NAMEshutdown - graciously close the system down
SYNOPSISshutdown [-hrRmkpd] [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 shut‐
down 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, and by syslog(3) (level
auth.notice). 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. With -R the system will
receive a hardware reset.
-p Attempt to power off the machine after shutting down; reset if
that is not possible on the current hardware.
-d Default CTRL-ALT-DEL shutdown.
-m Allows the operator to type a shutdown message on standard
input, that will be added to the messages displayed on all ter‐
minals.
-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 shut‐
down 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.)
SEE ALSOreboot(2), syslog(3), halt(8), boot(8).
AUTHOR
Edvard Tuinder (v892231@si.hhs.NL)
SHUTDOWN(8)