What file do I have to edit to make static DNS server in CentOS?
Almost every distro I know will wipe /etc/resolv.conf on reboot (I think DHCP does this) and thus the place to add static DHCP entries varies per distro. How do I add static DNS servers to a CentOS server, so that I know that my entries will survive a reboot?
It would really just come down to how you configure your dhcp client.
From the link provided, it seems the relevant file will be
/etc/sysconfig/network-scripts/ifcfg-eth0
For CentOS it looks like you add PEERDNS=no to /etc/sysconfig/network-scripts/ifcfg-eth0 (see the documentation).
More generically, iIf you’re using dhclient then put the following in your dhclient.conf file:
interface "eth0" {
supersede domain-name-servers 8.8.4.4, 8.8.8.8;
}
For dhcpcd you add the -R option to the command line to stop it changing /etc/resolv.conf.
Finally pump uses the -d option on the command line to stop it changing /etc/resolv.conf.