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Booting the Operating System
Booting and Shutting Down Linux
Appendix B
160
From the system console, choose the
EFI Shell entry from the EFI Boot Manager menu to access the
shell.
Step 2. Access the EFI System Partition for the SuSE Linux Enterprise Server boot device.
Use the map EFI Shell command to list the file systems (fs0, fs1, and so on) that are known and
mapped.
To choose a file system to use, enter its mapped name followed by a colon (:). For example, to
operate with the boot device that is mapped as fs3, enter fs3: at the EFI Shell prompt.
Step 3. Enter ELILO at the EFI Shell command prompt to launch the ELILO.EFI loader.
If needed, you can specify the loader’s full path by entering \efi\SuSE\elilo at the EFI Shell
command prompt.
Step 4. Allow the ELILO.EFI loader to proceed with booting the SuSE Linux kernel.
By default, the ELILO.EFI loader boots the kernel image and options specified by the default item
in the elilo.conf file.
To interact with the ELILO.EFI loader, interrupt the boot process (for example, enter a space) at the
ELILO boot prompt. To exit the loader use the exit command.
Shutting Down Linux
Use the shutdown command to shut down Red Hat Enterprise Linux or SuSE Linux Enterprise Server.
The Red Hat Enterprise Linux and SuSE Linux Enterprise Server shutdown command has the following
options:
-h Halts (power off) after shutdown.
Use the PC command at the management processor Command menu to manually power on
or power off server hardware, as needed.
-r Reboots after shutdown.
-c Cancels an already running shutdown.
time
When to shut down. (Required.) You can specify
time
in any of the following ways:
• Absolute time in the format
hh
:
mm
, in which
hh
is the hour (one or two digits) and
mm
is
the minute of the hour (two digits).
• Number of minutes to wait in the format +
m
, in which
m
is the number of minutes.
• now to immediately shut down; this is equivalent to using +0 to wait zero minutes.
For details, see the shutdown(8) Linux manpage. Also see the Linux manpage for the poweroff command.
Step 1. From the command line for Red Hat Enterprise Linux or SuSE Linux Enterprise Server, issue the
shutdown command to shut down the operating system.
Step 2. Log in to Linux running on the server you want to shut down.
Step 3. Issue the shutdown command with the desired command-line options, and include the required
time
argument to specify when the operating system shutdown is to occur.
For example, shutdown -r +20 shuts down and reboots the server in twenty minutes.