RHCE 6 Exam
 

What are the necessary things to know in terms of preparation if one is going in for the RHCE EX300 exam?

Do take a look at this link - http://www.redhat.com/training/courses/ex300/, if you already haven't. This, I believe, would be the best place to look for information on preparations.

Hope that helps. Cheers.

other than buy a license from red hat
install rhel 6.3
and use the non gui text only set up and learn HOW to do your work in the terminal
and in a ssh session from a remote machine ( say on the desk next to the rhel6 install)

and
practice , practice, and practice

thanks for the advice