cd /etc/sysconfig/network-scripts/ PREFIX=24 NETMASK=255.255.255.0 DNS1=128.226.1.19 DNS2=128.226.1.18 DNS3=128.226.1.11 DNS4=128.226.6.250 PREFIX=26 NETMASK=255.255.255.192 DNS1=128.226.1.19 DNS3=128.226.1.18 DNS2=128.226.1.11 DNS4=128.226.6.250 vi /etc/resolv.conf cp ifcfg-eth0 old-ifcfg-eth0 egrep 'PREFIX|NETMASK|DNS' *eth0 egrep 'PREFIX|NETMASK|DNS' *ifcfg-Auto_eth0 cp ifcfg-ens160 old-ifcfg-ens160 egrep 'PREFIX|NETMASK|DNS' *ifcfg-ens160