Preboot Execution Environment (PXE) Configuration in RHEL5

By | 01/02/2012

PXE stands for Preboot Execution Environment. PXE configuration is used to install the operating system automatically from linux redhat server without CD ROM. By using this single person can able to handle more number of operating system installation.

To use this PXE service, our system should be DHCP server( Server which assigns IP address when computer restarts / fresh OS installed in a network)

 

Requirements: DHCP Server

Package Name: tftp

An operating system copy of linux redhat version 5 should be copied to the directory /var/ftp/pub

 

By installing this tftp package, tftpboot directory will be created in /

#yum install tftp*

 

#cd /tftpboot

#mkdir linux-install

#cd linux-install

#mkdir msgs

#cd msgs

 

Copy all .msg extension files into

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the directory tftpboot/linux-install/msgs, make sure that OS files are copied to /var/ftp/pub

#cp /var/ftp/pub/isolinux/*.msg /tftpboot/linux-install/msgs

 

Copy initrd.msg file in Pxeboot into linux-install directory

#cp /var/ftp/pub/images/Pxeboot/initrd.img /tftpboot/linux-install

 

 

Copy vmlinz file in Pxeboot into linux-install directory

#cp /var/ftp/pub/images/Pxeboot/vmlinz /tftpboot/linux-install

 

FIND Pxelinux.0 file

#find l -name Pxelinux.0

—>> /usr/lib/syslinux/Pxelinux.0

 

Copy Pxelinux.0 file into linux-install directory

#cp /usr/lib/syslinux/Pxelinux.0 /tftpboot/linux-install

 

#mkdir Pxelinux.cfg

#cd Pxelinux.cfg

 

Make sure that linux-install directory having following

  1. initrd.img
  2. msgs
  3. pxelinux.0
  4. pxelinux.cfg
  5. vmlinuz

 

Create a file, name – dafault

pxelinux.cfg] # vim default

Type the following in the default file

default linux

prompt 1

timeout 100

label linux

kernel vmlinuz

append initrd=initrd.img

 

GO TO DHCP Server Configuration file

#vim /etc/dhcpd.conf

 

host ns{

……….

….

}

allow booting;

allow bootp;

class “pxeclients” {

match if substring (option vendor-class-identifier, 0, 9) = “PXEClient”;

next-server 192.168.1.254;

filename “linux-install/Pxelinux.0”;

}

Restart the Services

#service dhcpd restart

#chkconfig dhcpd on

 

#service xinetd restart

#chkconfig xinetd on

 

#service vsftpd restart

#chkconfig vsftpd on

 

#chkconfig tftp on

 

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