RHEL 7 file /etc/resolv.conf generated by /usr/sbin/dhclient-script


For manual configuration on RHEL 7 DNS address on /etc/resolv.conf, the configuration always reverts back after reboot because dhclient script controlling it, and it’s having label ';generated by /usr/sbin/dhclient-script'

etc resolv.conf is having generated by usr sbin dhclient-script

To solve this issue, edit file /etc/dhclient-enter-hooks

vi /etc/dhclient-enter-hooks

And append code

make_resolv_conf(){
	:
}

Save and close the file.