Reproduced CentOS Modify IP address, DNS, gateway

First, CentOS modified IP address

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

# Vi/etc/sysconfig/network-scripts/ifcfg-eth0 Telecom

# vi/etc/sysconfig/network-scripts/ifcfg-eth0:1 Netcom

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

Second, CentOS modify the gateway
Modify the configuration file for the gateway for the corresponding network card
[[Email protected]]# 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)

third, CentOS modified DNS

Modify the DNS configuration file for the corresponding NIC
# 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

Iv. Restarting the network configuration
# Service Network Restart
or
#/etc/init.d/network Restart

Modify IP Address
Immediate effect:
# ifconfig eth0 192.168.0.2 netmask 255.255.255.0
activation takes effect:
Modify/etc/sysconfig/network-scripts/ifcfg-eth0

To Modify the gateway Default gateways
Immediate effect:
# route add default GW 192.168.0.1 dev eth0
activation takes effect:
Modify/etc/sysconfig/network

Modify DNS
Modify/etc/resolv.conf
modified to take effect immediately, start the same effective

Modify Host name
Immediate effect:
# hostname CENTOS1
activation takes effect:
Modify/etc/sysconfig/network

Reproduced CentOS Modify IP address, DNS, gateway