Monday, June 20, 2011

Medialess installation of Redhat Enterprise 6/Centos/Scientic Linux 6

This procedure assumes you are already using Red Hat Enterprise Linux or another relatively modern Linux distribution, and the GRUB boot loader. It also assumes you are a somewhat experienced Linux user.

To perform medialess installation of Redhat Enterprise 6/Centos/Scientific Linux 6 without media or a PXE server, the system must have two files stored locally, a kernel and an initial RAM disk

Copy the vmlinuz and initrd.img files from a Red Hat Enterprise Linux DVD (or DVD image) to the /boot/ directory, renaming them to vmlinuz-install and initrd.img-install.

Editing the GRUB Configuration

The GRUB boot loader uses the configuration file /boot/grub/grub.conf. To configure GRUB to boot from the new files, add a boot stanza to /boot/grub/grub.conf that refers to them

title Installation
    root (hd0,0)
    kernel /boot/vmlinuz-install netmask= gateway=xxx.xx.xx.x dns=xxx.xx.xx.x vnc vncpassword=qwerty repo= lang=en_US keymap=us
    initrd /boot/initrd.img-install

If using network interface other than eth0 then you must have to specify it with ksdevice=ethX, then the kernel line will read something like this for eth1

kernel /boot/vmlinuz-install netmask= gateway=xxx.xx.xx.x dns=xxx.xx.xx.x ksdevice=eth1 vnc vncpassword=qwerty repo= lang=en_US keymap=us

The following options are generally useful for medialess installations:

IP = yourIP
netmas = Netmask
gateway = your Gateway
dns = your dns
vnc (for remote graphical installation)
vncpassword = Yourpassword
repo = Redhat/Centos/SL repo (In the sample I use the Scientific Linux 6 repo)

Also change the entry "default 0" to boot from new kernel entries, when done reboot the system.

Completing the installation:
From your local system use vncviewer to connect to the remote server and complete the installation process

$ vncviewer RemoteHostIP

1 comment:

  1. Hi, this is what i was looking for. Thanks for sharing.