Linux CentOS Modify NIC ip/Gateway settings

1. Modify the configuration file for the corresponding NIC IP

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, in Ifcfg-eth0 file it is eth0
Bootproto=static #设置网卡获得ip地址的方式, the possible options are static,dhcp or BOOTP, corresponding to statically specified IP addresses, IP addresses obtained through the DHCP protocol, IP addresses obtained through the 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 NIC
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, activates the device when the system starts
dns1=202.96.134.133//DNS I set the native ip192.168.128.138
dns2=202.96.128.166

2. Modify the configuration file for the gateway that corresponds to the NIC

Vi/etc/sysconfig/network

Modify the following content

Networking=yes (Indicates whether the system uses a network and is generally 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 hostname set in/etc/hosts)
gateway=192.168.1.1 (Sets the IP address of the gateway for the native connection. For example, the gateway is 10.0.0.2)

3. CentOS modifies DNS

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

4. Restart the network configuration

# Service Network Restart
Or
#/etc/init.d/network Restart