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Sidewinder G2 6.1.2 Administration Guide - Glossary of Technical ...

Sidewinder G2 6.1.2 Administration Guide - Glossary of Technical ...

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Chapter 3: General System Tasks<br />

Restarting or shutting down the system<br />

Restarting or<br />

shutting down<br />

the system<br />

40<br />

You can boot the <strong>Sidewinder</strong> <strong>G2</strong> to start up in one <strong>of</strong> two kernels: Operational<br />

or Administrative (see “<strong>Sidewinder</strong> <strong>G2</strong> kernels” on page 4 for descriptions <strong>of</strong><br />

each kernel). This section describes how to power up the <strong>Sidewinder</strong> <strong>G2</strong> to the<br />

Operational kernel when the <strong>Sidewinder</strong> <strong>G2</strong> is powered <strong>of</strong>f, and how to reboot<br />

or shut down the system when the <strong>Sidewinder</strong> <strong>G2</strong> is running.<br />

Important: The Administrative kernel is used only when an administrator needs to<br />

perform special tasks (such as installing s<strong>of</strong>tware or restoring <strong>Sidewinder</strong> <strong>G2</strong><br />

s<strong>of</strong>tware from a backup tape), or under certain circumstances for troubleshooting<br />

purposes. For information on booting the <strong>Sidewinder</strong> <strong>G2</strong> into the Administrative<br />

kernel, see “Powering up the system to the Administrative kernel” on page 636.<br />

When you power up the <strong>Sidewinder</strong> <strong>G2</strong>, it will boot to the Operational kernel by<br />

default. You will almost always run the <strong>Sidewinder</strong> <strong>G2</strong> in the Operational<br />

kernel, unless you need to perform a full system backup or restore, or to install<br />

hardware or s<strong>of</strong>tware. All procedures that require the Administrative kernel are<br />

discussed in Appendix F “Basic Troubleshooting”.<br />

The procedures to power up, reboot, or shut down the <strong>Sidewinder</strong> <strong>G2</strong> in the<br />

Operational kernel are described in the following subsections.<br />

Important: When the <strong>Sidewinder</strong> <strong>G2</strong> is rebooted or shutdown, a record <strong>of</strong> who<br />

issued the action is logged in the /var/log/messages file. This applies to a reboot or<br />

shutdown issued from the Admin Console or using the shutdown command.<br />

Powering on the system to the Operational kernel<br />

Because the Operational kernel is the default kernel, you can boot your<br />

<strong>Sidewinder</strong> <strong>G2</strong> to the Operational kernel by pressing the power button. Once<br />

the system has booted, you can start the Admin Console and log into your<br />

<strong>Sidewinder</strong> <strong>G2</strong>. Once you are logged in, you can perform the Operational<br />

kernel tasks described in this manual.<br />

Note: If the boot process fails, see “What to do if the boot process fails” on page<br />

651.

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