CentOS Configure fixed IP and DNS domain names

A To modify the DNS configuration file for the corresponding network card

sudo vi/etc/resolv.conf
Modify the following content

NameServer 8.8.8.8 #google域名服务器
NameServer 8.8.4.4 #google域名服务器

b Modify the configuration file of the gateway that corresponds to the network card
sudo vi/etc/sysconfig/network

Modify the following content
Networking=yes (Indicates whether the system is using the network, typically set to Yes.) If set to no, the network cannot be used, and many system services programs will not start.
Hostname=centos (Set the hostname of this machine, the host name set here should correspond to the host name set in/etc/hosts, do not need to write the whole URL (centos.google.com) )
gateway=192.168.1.1 (Sets the IP address of the gateway for this computer connection.) For example, the gateway is 10.0.0.2)

c Modify the IP address of the corresponding network card configuration file

sudo vi/etc/sysconfig/network-scripts/ifcfg-eth0

Modify the following content

Device=eth0 #描述网卡对应的设备别名, for example, Ifcfg-eth0 in a file that is eth0
Bootproto=static #设置网卡获得ip地址的方式, possible options for STATIC,DHCP or BOOTP, respectively corresponding to statically specified IP address, IP address obtained through DHCP protocol, IP address obtained through BOOTP protocol
broadcast=192.168.0.255 #对应的子网广播地址
HWADDR=00:07:E9:05:E8:B4 #对应的网卡物理地址
ipaddr=12.168.1.2 #如果设置网卡获得 IP address is statically specified, this field specifies the IP address of the network adapter
Ipv6init=no
Ipv6_autoconf=no
netmask=255.255.255.0 #网卡对应的网络掩码
network=192.168.1.0 #网卡对应的网络地址
Onboot=yes #系统启动时是否设置此网络接口, when set to Yes, this device is activated when the system starts
d) Restart Network configuration
# Service Network Restart
Or
#/etc/init.d/network Restart

#) files that need to be modified often

/etc/sysconfig/network
/etc/sysconfig/network-scripts/ifcfg-eth0
/etc/resolv.conf
/etc/hosts