SHUTDOWN(1M) (Essential Utilities) SHUTDOWN(1M)
NAME
shutdown - shut down system, change system state
SYNOPSIS
/etc/shutdown [ -y ] [ -ggrace_period [ -iinit_state ]
DESCRIPTION
This command is executed by the super-user to change the
state of the machine. By default, it brings the system to a
state where only the console has access to the system. This
state is traditionally called single-user.
The command sends a warning message and a final message
before it starts actual shutdown activities. By default,
the command asks for confirmation before it starts shutting
down daemons and killing processes. The options are used as
follows:
-y pre-answers the confirmation question so the command
can be run without user intervention. A default of 60
seconds is allowed between the warning message and the
final message. Another 60 seconds is allowed between
the final message and the confirmation.
-ggrace_period
allows the super-user to change the number of seconds
from the 60-second default.
-iinit_state
specifies the state that init(1M) is to be put in
following the warnings, if any. By default, system
state "s" is used.
Recommended system state definitions are:
state 0
Shut the machine down so it is safe to remove the
power. Have the machine remove power if it can. The
/etc/rc0 procedure is called to do this work.
Page 1 May 1989
SHUTDOWN(1M) (Essential Utilities) SHUTDOWN(1M)
state s, S
Bring the machine to the state traditionally called
single-user. The /etc/rc0 procedure is called to do
this work. These states unmount all file systems
except for the root file system. They kill all
processes except for special operating system related
processes.
state 5,6
The system is secured for powerdown/reset.
SEE ALSO
init(1M), rc0(1M), rc2(1M).
inittab(4) in the Programmer's Reference Manual.
Page 2 May 1989