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Old 08-05-2009, 07:03 AM   #1
Registered: Dec 2008
Posts: 34

Rep: Reputation: 16
How to configure RHEL4 to obtain DNS server automattically


My problem is that i have a broadband connection and it supports DHCP. For this i need to update the resolv.conf file with the DNS server names.
Earlier i used to do it manually. Can we do something so that the resolv.conf file gets updated itself and we do not have to go there and update evrytime.

i saw the following some where :-

we update /etc/sysconfig/network-scripts/ifcfg-eth0 with :-

PEERDNS=<answer>, where <answer> is one of the following:
yes — Modify /etc/resolv.conf with information from the server. If using DHCP, then yes is the default.
no — Do not modify /etc/resolv.conf.

Please explain the above to me. also tell me does it work ? Is there a way to do it via a GUI.
Old 08-05-2009, 08:14 AM   #2
Registered: Mar 2009
Distribution: CentOS - Ubuntu - Debian
Posts: 83

Rep: Reputation: 27

Then answer is simple, you should use the PEERDNS=yes parameter in
you ifcfg.ethXXX file that way when you get the IP of your machine
via DHCP the /etc/resolv.conf file should be updated.

In order to check if your resolv.conf file is updated correctly, the
first line in that file should be:
; generated by /sbin/dhclient-script

Also check that BOOTPROOT=dhcp is set in your network configuration

Best regards.


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