Para CENTOS , RED HAT , FEDORA:
[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
# Digital Equipment Corporation DECchip 21140 [FasterNet]
DEVICE=eth0
BOOTPROTO=static
ONBOOT=yes
HWADDR=00:15:5d:0a:46:20
BROADCAST=192.168.x.x
IPADDR=192.168.x.x
NETMASK=255.255.255.192
NETWORK=192.168.x.0
TYPE=Ethernet
GATEWAY=192.168.x.1
Para OPEN SUSE , SUSE :
[root@localhost ~]# cat /etc/sysconfig/network/ifcfg-eth0
BOOTPROTO='static'
BROADCAST='192.168.250.255'
ETHTOOL_OPTIONS=''
IPADDR='192.168.250.100'
MTU='1500'
NAME='Broadcom NetXtreme II BCM5708 Gigabit Ethernet'
NETMASK='255.255.255.0'
NETWORK='192.168.250.0'
REMOTE_IPADDR=''
STARTMODE='auto'
UNIQUE='JNkJ.swy66v437tA'
USERCONTROL='no'
_nm_name='bus-pci-0000:03:00.0'
GATEWAY='192.168.250.1'
Para DEBIAN y derivados :
Editar el archivo /etc/network/interfaces que define las interfases de red :
[root@localhost ~]# vi /etc/network/interfaces
Mostraría mas o menos lo siguiente :
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet static
address 192.168.100.10
netmask 255.255.255.0
network 192.168.100.0
broadcast 192.168.100.255
gateway 192.168.100.1
Reiniciamos la interfaz y ya nos deberia funcionar correctamente:
[root@localhost ~]#/etc/init.d/networking restart
Configurar servidores dns
[root@localhost ~]#cat /etc/resolv.conf
nameserver 192.168.x.x
nameserver 192.168.x.x
search localdomain