How to perform a text based install (no GUI) on Centos 6

To perform a text based install of Centos, press Tab while Install or upgrade an existing system is selected, per the below:

Centos0

Then a line of text will appear at the bottom beginning with vmlinuz per the below:

Centos1

Go to the end of the line and enter the word text then hit Enter. You will then see the familiar screen:

Centos2

Proceed with your text based install to your heart’s content!

Reference:
How can I install Centos 6 without the gui?