1.IP，NETMASK文件
   vim /etc/sysconfig/network-scripts/ifcfg-eth0
   +++++++++++++++++++++++++++++++++++++
   BOOTPROTO=STATIC/DHCP
   IPADDR=111.1.1.1
   NETMASK=255.0.0.0
  +++++++++++++++++++++++++++++++++++++

2.网关
   /etc/sysconfig/network
   +++++++++++++++++++++++++++++++++++++
   NETWORKING=yes
   HOSTNAME=xxx
   GATEWAY=111.1.1.1
   +++++++++++++++++++++++++++++++++++++

3.DNS
   /etc/resolv.conf
   +++++++++++++++++++++++++++++++++++++
   nameserver=202.196.64.1
   +++++++++++++++++++++++++++++++++++++