Once you have access to your BIOS settings, you will need to modify the boot sequence order of your system to boot from CD/DVD first. Most systems will display a message indicating which key needs to be pressed.
On many systems this key will be "F8", "F11" or "F12". As your computer reboots, you will need to press the appropriate key to access your system's BIOS settings. (Assuming that this machine is your intended target system for installation). Once you have burned your "iso" image of RHEL 7 to your DVD, you will need to leave the DVD in the DVD drive and reboot your system. Once you have downloaded your chosen image of RHEL 7 that matches your architecture, you will need to burn this to a blank DVD or if you are using a Virtual System, place the "iso" image in the relevant location that can be accessed by your Virtual System. To register and download your evaluation copy of Red Hat Enterprise Linux, simply follow this Link: Download RHEL ( Please note RHEL 7 has now been superseded by RHEL 8.) The following Red Hat Installation guide can be used for installing a Red Hat 7 Minimal Server configuration with a custom disk and Static IP addressing scheme. If you wish to try RHEL 7, you can download an evaluation copy giving you a full 30 day free trial (including updates). Red Hat Enterprise Linux is available for multiple platforms including x86, x86_64, PowerPC, IBM pSeries and IBM System z (Mainframe). RHEL is generally aimed at the commercial market. Red Hat Enterprise Linux (RHEL) is a Linux Operating System developed by Red Hat.