编辑tcp/ip信息：网卡地址， ip地址，网关地址，子网掩码
[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-P4P1
DEVICE="P4P1"
NM_CONTROLLED="yes"
ONBOOT="yes" //开机自动连接
HWADDR="00:0C:29:3C:9C:C3"
TYPE="Ethernet"
BOOTPROTO="none"
IPADDR=10.1.20.56
NETMASK=255.255.255.0
PREFIX=24
GATEWAY=10.1.20.254
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System P4P1"
UUID="63fb6acb-4fd1-4695-9faa-a3cb97c61f6e"
DNS1=202.102.224.68
DNS1=202.102.227.68
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ifconfig -a 就可以查看到Linux 的地址
service network restart 重启网络服务后生效