CentOS:配置静态IP，主机名，网关等。

1.配置静态的IP，网关，DNS，子网掩码

(1)IP，子网掩码
# vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
UUID=e33ff3f9-0808-4658-914e-df782cb31a74
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=static
IPADDR=192.168.2.81
NETMASK=255.255.255.0
NETWORK=192.168.2.0

(2)配置主机名，网关
# vi /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=centos01
GATEWAY=192.168.2.254

#vi /etc/hosts
Y.Y.Y.Y centos01

(3)配置DNS
# vi /etc/resolv.conf
NAMESERVER X.X.X.X

2.动态配置DHCP
# vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
UUID=e33ff3f9-0808-4658-914e-df782cb31a74
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=dhcp
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System eth0"
HWADDR=00:0C:29:BA:6D:9C
PEERDNS=yes
PEERROUTES=yes
LAST_CONNECT=1388439949