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## How to Use the ILOM Command-Line Interface (CLI) to Control Power

You can use the ILOM CLI to change the power state of the server. For example, you can perform the following power-related actions:

- Power on the server

- Shut down the OS gracefully and power off to standby power mode

- Perform an immediate power off to standby power mode (emergency shutdown) without shutting down the OS gracefully

- Reboot the server by cycling the power

Note - For information about the ILOM CLI, see the Sun Integrated Lights Out Manager (ILOM) 3.0 CLI Procedures Guide.

1. Connect to the ILOM CLI.

   Use one of the methods described in the following sections:

   - How to Connect to the ILOM Command-Line Interface Through the Serial Management Port in Sun ILOM 3.0 Supplement for the Sun Fire X4640 Server

   - How to Connect to the Command-Line Interface Using SSH in Sun ILOM 3.0 Supplement for the Sun Fire X4640 Server

2. Log in to the ILOM CLI using a user login with administrator privileges.

   When you are logged in, the CLI prompt appears.

   ->

3. To change the power state, enter one of the following commands.

   - To power on the server:

     -> `start /SYS`

   - To gracefully shut down the OS and power off the server to standby power mode:

     -> `stop /SYS`

   - To perform an immediate power off from full-power mode to standby power mode:

     -> `stop -f /SYS`

   - To reset the server (cycle power on and off):

     -> `reset /SYS`

4. To log out of the CLI, enter the command:

   -> `exit`

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