How to Install CentOS 7 Using Live CD

you will learn how to install CentOS 7 in a few easy steps.
Step 1: Download The ISO Image

To get a copy of CentOS 7 download from its source mirror. CentOS 7 is now shipping for 64 bit platforms, and currently there is no 32 bit ISO image. This is primarily due to the fact that most servers in production are 64 bit.
Step 2: Make A bootable Drive

After you have downloaded the ISO image, make a bootable USB drive using Unetbootin. Alternatively you can burn a DVD drive using Brasero or your favourite CD/DVD burning software.
Step 3: Begin Installation

To begin installation, click on the Install to Hard Drive icon on the desktop.

Step 4: Select Language And Keyboard

Select your preferred language as well as the Keyboard type you have. Take care not forget to choose the correct keyboard or else you will end up with a few scrambled keys.