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The first CentOS 6 client on my network doesn't seem to want to register its name in DNS. It is using NetworkManager to manage the network and I think I've hit all the places where I could possibly set DHCP_HOSTNAME. Is there a way to stop using NetworkManager?

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You could always remove NetworkManager "yum remove NetworkManager" and manually use "ifconfig" and "dhclient" to connect. –  Christopher Wilson Mar 1 '12 at 1:52
Remember that NetworkManager just calls out to dhclient to handle DHCP configuration. So you can stop using NetworkManager, but there's a good chance that you'll still have the same problem. –  larsks Mar 1 '12 at 3:17
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