Changing the yum's repositories

[Paul Smith]

On 8/27/05, Rahul Sundaram <sundaram at redhat.com> wrote:
> >How can one change the yum's repositories?
> >
> Check this out
> http://fedora.redhat.com/docs/yum/

Thanks, Rahul. I have read the whole document, but it cannot answer my
question. For instance, how can I change the extras repository? I have
tried kyum, but I do not know the syntax very well, as I am a novice
user of Fedora, coming from Mandriva.

Paul