Shutting Down a System

Oracle Solaris is designed to run continuously so that the electronic mail and network software can work correctly. However, some system administration tasks and emergency situations require that the system be shut down to a level where it is safe to remove power. In some cases, the system needs to be brought to an intermediate level, where not all system services are available.

Such cases include the following:

Adding or removing hardware
Preparing for an expected power outage
Performing file system maintenance, such as a backup

For information about using your system's power management features, see the poweradm(1M) man page.

For detailed information when to shutdown a system and which commands to use, see System Shutdown Commands in Booting and Shutting Down Oracle Solaris on SPARC Platforms.

How to Shut Down a System by Using the `shutdown` Command

Become the root role.
For a multiuser timesharing server shutdown, find out if any users are logged in to the system.
```
# who
```
Shut down the system.
```
# shutdown -iinit-state -ggrace-period -y
```
-iinit-state

Brings the system to an init state that is different from the default of S. The choices are 0, 1, 2, 5, and 6.
Run levels 0 and 5 are states reserved for shutting the system down. Run level 6 reboots the system. Run level 2 is available as a multiuser operating state.

-ggrace-period

Indicates a time (in seconds) before the system is shut down. The default is 60 seconds.

-y

Continues to shut down the system without intervention. Otherwise, you are prompted to continue the shutdown process after 60 seconds.

For more information, see the shutdown(1M) man page.
If you are asked for confirmation, type y.
```
Do you want to continue? (y or n): y
```
If you used the shutdown -y command, you will not be prompted to continue.

Type the root password, if prompted.

Type Ctrl-d to proceed with normal startup,
(or give root password for system maintenance): xxxxxx

After you have finished performing any system administration tasks, press Control-D to return to the default system run level.

Example 4-3 SPARC: Bringing a System to a Shutdown State (Run Level 0) by Using the shutdown Command

In the following example, the shutdown command is used to bring a SPARC based system to run level 0 in five minutes without requiring additional confirmation.

# who
root       console       Jun 17 12:39
userabc         pts/4        Jun 17 12:39   (:0.0)
# shutdown -i0 -g300 -y
Shutdown started.    Thu Jun 17 12:40:25...

Broadcast Message from root (console) on pretend Thu Jun 17 12:40:25...
The system pretend will be shut down in 5 minutes 
.
.
.
Changing to init state 0 - please wait
# 
INIT: New run level: 0
The system is coming down.  Please wait.
System services are now being stopped.
.
.
.
The system is down.
syncing file systems... done
Program terminated
Type  help  for more information
ok

Bringing a System to a Shutdown State (Run Level 0) by Using the `init` Command

Run levels 0, 5, and 6 are reserved for shutting down a system. Bringing a system to run level 0 enables power to the system to be safely turned off. As shown in the example that follows, the init command is used to bring a system to run level 0.

How to Shut Down a System by Using the `init` Command

Use this procedure when you need to shut down a stand-alone system.

Become the root role.
Shut down the system.
```
# init 5
```
For more information, see the init(1M) man page.

Example 4-4 Bringing a System to the Shutdown State (Run Level 0) by Using the init Command

In the following example, the init command is used to bring a system to the level where it is safe to turn off power:

# init 0
#
INIT: New run level: 0
The system is coming down.  Please wait.
.
 
.
 
.
The system is down.
syncing file systems... [11] [10] [3] done
Press any key to reboot

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