Config Network Adapter for CentOS Linux

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

#####################################
# for static ip
#DEVICE="eth0"
#BOOTPROTO="static"
#HWADDR="00:30:48:56:A6:2E"
#IPADDR="10.1.1.5"
#NETMASK="255.255.255.192"
#ONBOOT="yes"

#####################################
# for dhcp ip
DEVICE="eth0"
BOOTPROTO="dhcp"
ONBOOT="yes"


vi /etc/sysconfig/network
NETWORKING=yes

# for static ip
#HOSTNAME=host1.mysite.com
#GATEWAY=10.1.1.1

ifdown eth0
ifup eth0
or /etc/init.d/network restart