[CentOS] resolv.conf rewritten every reboot. How to figure out who and why?

Dave wrote:
> My machine has a static IP, with dhcp and IPv6 disabled. Every time I
> reboot, some process rewrites /etc/resolv.conf, including a comment
> about dhcpclient. The only package I have installed that shows up in
> "rpm -qa|grep -i dhcp" is dhcpv6-client-1.0.10-16.el5, and nothing in
> there is named dhcpclient.
> 
> I'd like to figure out what software is rewriting this file and why.
> man 5 resolv.conf  and man resolver are unhelpful in this case. rpm
> reports /etc/resolv.conf is not owned by any package.
> 
> At this point, I am as (or more) interested in pointers regarding how
> to find the answer as I am in the actual answer. Please teach me to
> fish.
> 
> mahalo,
> Dave
Hi

Is network-manager enabled?

Regards

mg.