[CentOS] how to open a tcp port?

On 3 Mar 2010, at 12:49, hadi motamedi <motamedi24 at gmail.com> wrote:

> I do not want to re-install the OS with all of the packages selected
> from the installation media .

I understand that.  What do you want to achieve out of this whole
process?  What service do you expect to interact with over tcp?

Your posts elsewhere state that you are using RedHat 9 - is that
correct?

Ben