centerOS设置静态IP，使用的是NAT模式
1.通过命令查看当前Ip地址: $ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:51:00:18
inet addr:192.168.43.10 Bcast:192.168.43.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe51:18/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:33 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:1790 (1.7 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:18 errors:0 dropped:0 overruns:0 frame:0
TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1448 (1.4 KiB) TX bytes:1448 (1.4 KiB)
2.登录超级管理帐号：$su
输入密码：
3.进入/etc/sysconfig/network-scripts/目录
#cd /etc/sysconfig/network-scripts/
4.查看当前目录下的文件
# ls
[root@localhost network-scripts]# ls
ifcfg-eth0 ifdown-isdn ifup-aliases ifup-plusb init.ipv6-global
ifcfg-lo ifdown-post ifup-bnep ifup-post net.hotplug
ifdown ifdown-ppp ifup-eth ifup-ppp network-functions
ifdown-bnep ifdown-routes ifup-ippp ifup-routes network-functions-ipv6
ifdown-eth ifdown-sit ifup-ipv6 ifup-sit
ifdown-ippp ifdown-tunnel ifup-isdn ifup-tunnel
ifdown-ipv6 ifup ifup-plip ifup-wireless
5.修改ifcfg-eth0文件（需要超级管理员权限才能保存wen'jian）
#vim ifcfg-eth0
进入文件后按 i编辑文件
IPADDR=192.168.2.10
NETMASK=255.255.255.0
GATEWAY=192.168.2.2
DNS1=192.168.2.2编辑完成后按esc :wq保存文件，通过cat ifcfg-eth0查看文件
6.使配置文件生效
#service network restart
[root@localhost network-scripts]# service network restart
Shutting down interface eth0: Device state: 3 (disconnected)
[ OK ]
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
Bringing up interface eth0: Active connection state: activating
Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/2
state: activated
Connection activated
[ OK ]7.检查是否可以访问外网
#curl www.baidu.com
返回baidu的网页信息，说明配置成功。