Hi,
I need to know how to automatically set the dns name server for the nic card using command line or a script. I have the nic card loading fine using the /etc/sysconfig/network-scripts/ifcfg-eht0 file. I have routes loading fine using the /etc/rc.d/rc.local file. I know the dns ip goes in the /etc/resolv.conf file. What I want is to not have to manually put that into the file. Is there a way like the ip address and routes to automatically have it added?

Add a line to the /etc/sysconfig/network file that has:

DNSSRVRS 192.168.0.1 192.168.100.1

Substitute your nameserver ip(s) as appropriate. The /etc/sysconfig/network-scripts/ifup script reads this file and creates /etc/resolv.conf. You may want to check that script and make sure my spelling is correct.

That didn't do anything. I went to /etc/sysconfig/network...added DNSSRVRS 192.168.0.33, saved it and rebooted but it wasn't in the resolv.conf file. And I couldn't ping anything by name.

Oops, you also need to add a line to the /etc/sysconfig/network that says:

SEARCH domain.com

with your domain name.

Sorry, forgot about that.

Added that SEARCH degree.com to the network file and it still did not do anything. If I manually add the nameserver and search info to the resolv.conf file everything works perfectly. But adding those lines to the network file make no changes to resolv.conf.

I think that depends on which distribution you use. You could easily check the ifup script to see if it does anything with the DNSSRVRS variable. You could always add it to the ifup script yourself.

Something like this might work:

if [ "$DNSSRVRS" != "" ]
then
mv /etc/resolv.conf /etc/resolv.conf.sv

for dnsserver in $DNSSRVRS
do
echo nameserver $dnsserver >> /etc/resolv.conf
done

echo search $SEARCH >> /etc/resolv.conf

fi


You'd have to set the SEARCH variable to the right value. I also haven't tested it so you might need to check it to make sure it all works right.