shutdown(1M) manual page
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shutdown - shut down system, change system state
/usr/sbin/shutdown
[ -y ] [ -g grace-period ] [ -i init-state ] [ message ]
SUNWcsu
shutdown is executed by the super-user to change the state of
the machine. In most cases, it is used to change from the multi-user state
(state 2) to another state.
By default, shutdown brings the system to a
state where only the console has access to the operating system. This state
is called single-user.
Before starting to shut down daemons and killing processes,
shutdown sends a warning message and, by default, a final message asking
for confirmation. message is a string that is sent out following the standard
warning message "The system will be shut down in ..." If the string contains
more than one word, it should be contained within single (’) or double (")
quotation marks.
The warning message and the user provided message are output
when there are 7200, 3600, 1800, 1200, 600, 300, 120, 60, and 30 seconds
remaining before shutdown begins. See EXAMPLES.
System state definitions
are:
- state 0
- Stop the operating system.
- state 1
- State 1 is referred to as
the administrative state. In state 1 file systems required for multi-user
operations are mounted, and logins requiring access to multi-user file systems
can be used. When the system comes up from firmware mode into state 1, only
the console is active and other multi-user (state 2) services are unavailable.
Note that not all user processes are stopped when transitioning from multi-user
state to state 1.
- state s, S
- State s (or S) is referred to as the single-user
state. All user processes are stopped on transitions to this state. In the
single-user state, file systems required for multi-user logins are unmounted
and the system can only be accessed through the console. Logins requiring
access to multi-user file systems cannot be used.
- state 5
- Shut the machine
down so that it is safe to remove the power. Have the machine remove power,
if possible. The rc0 procedure is called to perform this task.
- state 6
- Stop
the operating system and reboot to the state defined by the initdefault
entry in /etc/inittab. The rc6 procedure is called to perform this task.
- -y
- Pre-answer the confirmation question so the command can be run
without user intervention.
- -g grace-period
- Allow the super-user to change the number of seconds from
the 60-second default.
- -i init-state
- If there are warnings, init-state specifies
the state init is to be in. By default, system state *lqs*rq is used.
In
the following example, shutdown is being executed on host foo and is scheduled
in 120 seconds. The warning message is output 2 minutes, 1 minute, and
30 seconds before the final confirmation message.
example# shutdown -i S -g 120 "===== disk replacement ====="
Shutdown started. Tue Jun 7 14:51:40 PDT 1994
Broadcast Message from root (pts/1) on foo Tue Jun 7 14:51:41...
The system will be shut down in 2 minutes
===== disk replacement =====
Broadcast Message from root (pts/1) on foo Tue Jun 7 14:52:41...
The system will be shut down in 1 minutes
===== disk replacement =====
Broadcast Message from root (pts/1) on foo Tue Jun 7 14:53:41...
The system will be shut down in 30 seconds
===== disk replacement =====
Do you want to continue? (y or n):
- /etc/inittab
- controls process dispatching by init
boot(1M)
,
halt(1M)
, init(1M)
, killall(1M)
, reboot(1M)
, ufsdump(1M)
, init.d(4)
, inittab(4)
,
nologin(4)
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