1，自動獲取IP的方法
自動獲取與4個文件有關係
a），/etc/sysconfig/network-scripts/ifcfg-eth0
[zhangy@localhost network-scripts]$ cat ifcfg-eth0
# Marvell Technology Group Ltd. 88E8039 PCI-E Fast Ethernet Controller
DEVICE=eth0 //由eth0來啓動
BOOTPROTO=dhcp //獲取IP的方式是自動獲取，static是固定IP，none是手動
HWADDR=00:16:D3:A2:F6:09 //網卡的物理地址
IPV6INIT=yes //是否支持IP6
IPV6_AUTOCONF=yes //IP6是否自動配置
ONBOOT=yes //啓動時網絡接口是否有效,我只改了這行重啓後就可以了
b），/etc/sysconfig/network
[zhangy@localhost network-scripts]$ cat /etc/sysconfig/network
NETWORKING=yes //網絡是否可用
NETWORKING_IPV6=yes
HOSTNAME=localhost.localdomain//主機名，主機名在/etc/hosts裏面配置
c），/etc/hosts
[zhangy@localhost network-scripts]$ cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost //根/etc/resolv.conf中search要對應，localhost.localdomain
::1 localhost6.localdomain6 localhost6
d），/etc/resolv.conf
[zhangy@localhost network-scripts]$ cat /etc/resolv.conf
; generated by /sbin/dhclient-script
nameserver 192.168.1.1 //DNS服務器對應的IP
search localdomain//搜索要找的域名，在/etc/hosts裏面設定的有
2,手動設定
手動設定只要修改三個文件就可以了
a），/etc/sysconfig/network
[zhangy@localhost network-scripts]$ cat /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=yes
#HOSTNAME=localhost.localdomain //爲什麼要把主機名註釋掉，一般先解析主機名或者域名，再解析DNS
GATEWAY=192.168.1.1 //加上網關
b），/etc/sysconfig/network-scripts/ifcfg-eth0
[zhangy@localhost network-scripts]$ cat ifcfg-eth0
# Marvell Technology Group Ltd. 88E8039 PCI-E Fast Ethernet Controller
DEVICE=eth0
BOOTPROTO=none //啓動爲手動
BROADCAST=192.168.1.255
HWADDR=00:16:D3:A2:F6:09
IPADDR=192.168.1.108 //設置的IP
NETMASK=255.255.255.0 //子網掩碼
NETWORK=192.168.1.0
IPV6INIT=yes
IPV6_AUTOCONF=yes
ONBOOT=yes
TYPE=Ethernet //網絡類型
c），/etc/resolv.conf
[zhangy@localhost network-scripts]$ cat /etc/resolv.conf
#; generated by /sbin/dhclient-script
#nameserver 192.168.1.1
#search localdomain
nameserver 116.228.111.118 //加上主DNS
nameserver 180.168.255.18 //加上次DNS