Installation guide

18 Chapter 4. Installing Red Hat Enterprise Linux

4.3.3.1. Kernel Options

Options can also be passed to the kernel. For example, to instruct the kernel to use all the RAM in a

system with 128 MB of RAM, at the installation boot prompt, enter:

linux mem=128M

For text mode installations, use:

linux text mem=128M

With most computers, there is no need to pass this argument to the kernel. The kernel detects the

amount of memory your system has in most cases. However, using this command is often helpful

for testing purposes. For example, you can boot with less memory by passing a linux mem=64M or

linux text mem=64M option to the kernel.

After entering any options, press [Enter] to boot using those options.

If you need to specify boot options to identify your hardware, please write them down. The boot

options are needed during the boot loader conﬁguration portion of the installation (refer to

Section 4.17 x86, AMD64, and Intel® EM64T Boot Loader Conﬁguration for more information).

4.4. Selecting an Installation Method

What type of installation method do you wish to use? The following installation methods are available:

CD-ROM

If you have a CD-ROM drive and the Red Hat Enterprise Linux CD-ROMs, you can use this

method. Refer to Section 4.5 Installing from CD-ROM, for CD-ROM installation instructions.

Hard Drive

If you have copied the Red Hat Enterprise Linux ISO images to a local hard drive, you can use

this method. You need a boot CD-ROM. Refer to Section 4.6 Installing from a Hard Drive, for

hard drive installation instructions.

NFS

If you are installing from an NFS server using ISO images or a mirror image of Red Hat Enter-

prise Linux, you can use this method. You need a boot CD-ROM (use the linux askmethod

boot option). Refer to Section 4.8 Installing via NFS for network installation instructions. Note

that NFS installations may also be performed in GUI mode.

FTP

If you are installing directly from an FTP server, use this method. You need a boot CD-ROM

(use the linux askmethod boot option). Refer to Section 4.9 Installing via FTP, for FTP in-

stallation instructions.