Installation guide

Chapter 15. Additional Boot Options
for IBM Power Systems
This appendix discusses additional boot and kernel boot options available for the Red Hat En-
terprise Linux installation program.
To use any of the boot options presented here, type the command you wish to invoke at the in-
stallation boot: prompt.
Boot Time Command Arguments
askmethod
this command asks you to select the installation method you would like to use when booting
from the Red Hat Enterprise Linux CD-ROM.
dd
this argument causes the installation program to prompt you to use a driver diskette.
dd=url
this argument causes the installation program to prompt you to use a driver image from a
specified HTTP, FTP, or NFS network address.
display=ip:0
this command allows remote display forwarding. In this command, ip should be replaced
with the IP address of the system on which you want the display to appear.
On the system you want the display to appear on, you must execute the command xhost
+remotehostname, where remotehostname is the name of the host from which you are running
the original display. Using the command xhost +remotehostname limits access to the remote
display terminal and does not allow access from anyone or any system not specifically au-
thorized for remote access.
driverdisk
this command performs the same function as the dd command and also prompts you to use
a driver diskette during the installation of Red Hat Enterprise Linux.
ide=nodma
this command disables DMA on all IDE devices and may be useful when having IDE-related
problems.
mediacheck
this command gives you the option of testing the integrity of the install source (if an ISO-
based method). this command works with the CD, DVD, hard drive ISO, and NFS ISO in-
stallation methods. Verifying that the ISO images are intact before you attempt an installa-
tion helps to avoid problems that are often encountered during an installation.
mem=xxxm
this command allows you to override the amount of memory the kernel detects for the ma-
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