Halting the Operating System

You must halt the operating system in an orderly manner. Do not turn off the system by disconnecting the AC plug or pulling the battery out. Doing so can cause damage to your operating system. Any data you have not saved will be lost.

Sometimes you must halt the operating system and turn the system off.

You must halt the operating system and turn off the power to:

• Change the system configuration

• Remove or install a part, such as a memory card, inside the system unit

• Remove or install an external drive unit or monitor

• Install a PCMCIA card in a slot previously occupied by a PCMCIA card of a different type

• Install, reinstall, or upgrade the operating system

• When your system is hung (frozen), you will not be able to halt the operating system; you must turn the power off

Changing the System Configuration

When you change the system configuration, for example, to add or remove an internal part such as a memory card or an external part such as a CD ROM or replace a PCMCIA card with one of a different type, you must halt the operating system and turn the power off. A configuration change requires you to reboot the system after adding or removing items. You will need to use the boot -r command to reconfigure the system.

Shutting the System Down

To halt the system, you must first become superuser.

1. Type su.

   ---

   tempest% su
   

   ---

   The system will ask you for a password.

2. Type your superuser password.

   A screen will appear with a # sign.

3. Type init 0.

   ---

   # init 0 
   screen messages
   ok

   ---

   After the ok prompt appears, you can turn the system off. Press Shift and the power key to turn the system off.

Rebooting After a Configuration Change

After you add a device to your SPARCstation Voyager, you must reboot in a particular way. After the system comes up, type boot -r to reconfigure the system.