Chapter 20. Additional Boot Options

Chapter 20. Additional Boot Options

This section discusses additional boot and kernel boot options available for the Red Hat Enterprise Linux installation program.

To use any of the boot options presented here, type the command you wish to invoke at the installation 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=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 authorized for remote access.

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 installation methods. Verifying that the ISO images are intact before you attempt an installation helps to avoid problems that are often encountered during an installation.

noprobe

this command disables hardware detection and instead prompts the user for hardware information.

rescue

this command runs rescue mode. Refer to Chapter 26, Basic System Recovery for more information about rescue mode.

text

this command disables the graphical installation program and forces the installation program to run in text mode.

vnc

this command allows you to install from a VNC server.

vncpassword=

this command sets the password used to connect to the VNC server.

noipv6

this command disables the default selection of ipv6 options during the installer stage 1 processing. Ipv6 settings may still be made manually if this option is specified, but the default behavior will be that Ipv6 settings are not enabled.

cmdline

The 3270 console (most often used during installation on IBM System z) does not recognize terminal formatting entries common to most unix-style terminals. Specifying this option changes the behavior of anaconda during kickstart installations so that console output on the 3270 is much better. This option should not be used for regular, interactive installations.

RUNKS=1

This option is used to specify (usually in conjunction with the cmdline option) kickstart installation for IBM System z.


Note: This documentation is provided {and copyrighted} by Red Hat®, Inc. and is released via the Open Publication License. The copyright holder has added the further requirement that Distribution of substantively modified versions of this document is prohibited without the explicit permission of the copyright holder. The CentOS project redistributes these original works (in their unmodified form) as a reference for CentOS-5 because CentOS-5 is built from publicly available, open source SRPMS. The documentation is unmodified to be compliant with upstream distribution policy. Neither CentOS-5 nor the CentOS Project are in any way affiliated with or sponsored by Red Hat®, Inc.