RedHat Network Configuration

Linux network configuration is basically implemented by modifying several configuration files. Although you can also use ifconfig to set IP addresses, use route to configure the default gateway, and use hostname to configure the host name, but it will be lost after restart. The following is the relevant configuration file:/ect/hosts: configure the Host Name and IP address corresponding to the local DNS/etc/resolv

Linux network configuration is basically implemented by modifying several configuration files. Although you can also use ifconfig to set IP addresses, use route to configure the default gateway, and use hostname to configure the host name, but it will be lost after restart.

The following are related configuration files:

/Ect/hosts: configure the Host Name and IP address, and provide resolution for the Local Machine

/Etc/resolv. conf configure the domain name (this domain name will take effect when it is not resolved within hosts)

/Etc/sysconfig/network configure host name and gateway

/Etc/sysconfig/network-scripts/ifcfg-eth0 configure network parameters such as IP and Mask

1. Nic Configuration

Cat/etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE = eth0

ONBOOT = yes

BOOTPROTO = static

IPADDR = 192.168.1.250

NETMASK = 255.255.255.0

GATEWAY = 192.168.76.1

Ifconfig eth0 210.34.6.89 netmask 255.255.255.128 broadcast 210.34.6.127

Ifconfig eth0: 0 192.168.0.253 netmask 255.255.255.0

Ifconfig eth0: 1 192.168.0.252 netmask 255.255.255.0

Ifconfig eth0 down

Ifconfig eth0 up

Ii. Multi-nic Configuration:

Cat/etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE = eth0

BOOTPROTO = static

IPADDR = 192.168.1.2

NETMASK = 255.255.255.0

ONBOOT = yes

Cat/etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE = eth1

BOOTPROTO = static

IPADDR = 222.157.4.82

NETMASK = 255.255.255.255.128

ONBOOT = yes

Vi/etc/rc. d/rc. local

Route add-net 192.168.0.0/24 gw 192.168.0.254 dev eth0

Route add-net 222.157.0.0/16 gw 222.157.66.1 dev eth1

3. Gateway Configuration:

Note: add the command to/etc/rc. d/rc. local after setting using the command below. Otherwise, the setting will be automatically cleared after restart!

1. Configure in/etc/sysconfig/network-scripts/ifcfg-eth0;

GATEWAY = 192.168.76.1

2. Configure in/etc/sysconfig/network:

Cat/etc/sysconfig/network

NETWORKING = yes

HOSTNAME = zhaohang.com

GATEWAY = 192.168.76.1

3. Run the following command to set:

If you only need to add a default route, you can set it as follows:

Route add default gw 192.168.1.1

Route del default gw 192.168.1.254 (you can delete the default route. After this method is changed, it will take effect in a few minutes .)

If both NICs require gateways, you can set them as follows:

Route add-net 192.168.0.0/24 gw 192.168.0.254 dev eth0

Route add-net 222.157.0.0/16 gw 222.157.66.1 dev eth1

Note: After you have set the route or the default gateway, you can run the following command to view it:

Route-n

Netstat-rn

Route print (For windows)