首先将源文件进行备份：
[zgw@localhost 桌面]$ sudo cp /etc/sysconfig/network-scripts/ifcfg-eno16777736 /etc/sysconfig/network-scripts/ifcfg-eno16777736.bak.zgw
[sudo] password for zgw:
编辑配置文件：
[zgw@localhost 桌面]$ sudo vi /etc/sysconfig/network-scripts/ifcfg-eno16777736
打开后如下所示：
TYPE=Ethernet
BOOTPROTO=dhcp
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=eno16777736
UUID=00c21c9b-6e66---4b1bd2fdcf07
DEVICE=eno16777736
ONBOOT=no
修改后如下：
TYPE=Ethernet
BOOTPROTO=static
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=eno16777736
UUID=00c21c9b-6e66---4b1bd2fdcf07
DEVICE=eno16777736
ONBOOT=yes
IPADDR=192.168.89.11 #IP
NATMASK=255.255.255.0 #网关
GATEWAY=192.168.89.2 #子网掩码
DNS1=1.2.4.8 #DNS
常用的DNS地址：http://www.cnblogs.com/boyzgw/p/6651234.html
修改完成之后重启网卡服务：
[zgw@localhost 桌面]$ /etc/init.d/network restart
Restarting network (via systemctl): [ 确定 ]
查看并测试：
[zgw@localhost 桌面]$ ip addr
: lo: <LOOPBACK,UP,LOWER_UP> mtu qdisc noqueue state UNKNOWN
link/loopback ::::: brd :::::
inet 127.0.0.1/ scope host lo
valid_lft forever preferred_lft forever
inet6 ::/ scope host
valid_lft forever preferred_lft forever
: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu qdisc pfifo_fast state UP qlen
link/ether :0c::1e::ed brd ff:ff:ff:ff:ff:ff
inet 192.168.89.11/ brd 192.168.89.255 scope global eno16777736
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe1e:41ed/ scope link
valid_lft forever preferred_lft forever
: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu qdisc noqueue state DOWN
link/ether ::::: brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/ brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
: virbr0-nic: <BROADCAST,MULTICAST> mtu qdisc pfifo_fast master virbr0 state DOWN qlen
link/ether ::::: brd ff:ff:ff:ff:ff:ff
[zgw@localhost 桌面]$ ping www.baidu.com
PING www.a.shifen.com (220.181.111.188) () bytes of data.
bytes from 220.181.111.188: icmp_seq= ttl= time=59.1 ms
bytes from 220.181.111.188: icmp_seq= ttl= time=54.3 ms
bytes from 220.181.111.188: icmp_seq= ttl= time=72.5 ms
^C64 bytes from 220.181.111.188: icmp_seq= ttl= time= ms --- www.a.shifen.com ping statistics ---
packets transmitted, received, % packet loss, time 30207ms
rtt min/avg/max/mdev = 54.341/85.961/157.819/42.021 ms
[zgw@localhost 桌面]$ ping www.hao123.com #万一百度打盹儿了呢
PING hao123.n.shifen.com (180.149.132.3) () bytes of data.
bytes from 180.149.132.3: icmp_seq= ttl= time=60.9 ms
bytes from 180.149.132.3: icmp_seq= ttl= time=43.4 ms
^C64 bytes from 180.149.132.3: icmp_seq= ttl= time= ms --- hao123.n.shifen.com ping statistics ---
packets transmitted, received, % packet loss, time 20137ms
rtt min/avg/max/mdev = 43.477/90.098/165.833/54.027 ms
[zgw@localhost 桌面]$