[CentOS] dhcp question

chloe K wrote:
> can i know how to set up dns cache server?
>  
> do you have any useful website?
>  
>

for your use, dnsmasq would do nicely.   with the rpmforge repo 
configured...

    # yum install dnsmasq
    # chkconfig dnsmasq on
    # service dnsmasq start

*done*

dnsmasq has some configuration options in /etc/dnsmasq.conf  as well as 
man pages explaining more.  there's some notes on it here, 
http://www.thekelleys.org.uk/dnsmasq/doc.html