Configurar IP fixo e DNS no CentOS 6.x

via console em modo root

vim /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

TYPE=Ethernet

UUID=0cfe9c92-84e5-4e13-b027-1222e33d3fa3

ONBOOT=yes

NM_CONTROLLED=yes

BOOTPROTO=none

IPADDR=192.168.77.130

PREFIX=24

GATEWAY=192.168.77.77

DNS1=8.8.8.8

DOMAIN=8.8.4.4

DEFROUTE=yes

IPV4_FAILURE_FATAL=yes

IPV6INIT=no

NAME=”System eth0″

HWADDR=08:00:27:F5:FC:AA

LAST_CONNECT=1503014636

Reiniciando a placa de rede:# service network restart

Ou:

# /etc/init.d/network restart

Abrindo o arquivo de configuração do DNS:

# vim /etc/resolv.conf

nameserver 8.8.8.8
nameserver 8.8.4.4

outros comandos

route add default gw 192.168.1.1