[CentOS] force b/w printing

Greetings,

On 8/3/10, Janez Kosmrlj <postnalista at googlemail.com> wrote:
> Has anyone an idea, how to force users to print b/w on a color printer.

Strange how come people miss out the loclhost:631 on the system
hosting the  printer and check out the printer options button.

I swear, it is gui.

This is in addition to commandline options mentioned in the other post.

Regards,

Rajagopal