X starting up at boot time!

[Martin Rodolfo Gonzalez]

Hi,       As you all might have assumed by my dumb question, I am new to the linux world. Well, here goes my problem. I have recently installed redhat 6.1, and during the installation process the xwindows enviroment was set to start up automatically at boot time. Therefore I would like to know what I should do in order to avoid such thing from happening, since I really prefer to have the right to choose when to start X and when not to do it.   Thanks.