I struggled to solve this :)
I wanted to add a dns server to /etc/resolv.conf before the name server the client gets from dhcp server.
In Debian based linux the procedure is to add the option to /etc/dhclient.conf or similar then restart the network or bring up the interface, But in Centos / RHEL there is some trick :
You have to create a file named dhclient-<interface_name>.conf in the /etc.
Example :
To add another dns for the eth0 interface create : /etc/dhclient-eth0.conf
file and add this line to it :
Where 10.1.1.1 is your additional name server
In fact it is more logical as you can have different settings for different interfaces.
I wanted to add a dns server to /etc/resolv.conf before the name server the client gets from dhcp server.
In Debian based linux the procedure is to add the option to /etc/dhclient.conf or similar then restart the network or bring up the interface, But in Centos / RHEL there is some trick :
You have to create a file named dhclient-<interface_name>.conf in the /etc.
Example :
To add another dns for the eth0 interface create : /etc/dhclient-eth0.conf
file and add this line to it :
prepend domain-name-servers 10.1.1.1;
Where 10.1.1.1 is your additional name server
In fact it is more logical as you can have different settings for different interfaces.
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