CentOS cannot find ifcfg-eth0 solution

Problem Description: the ifconfig command cannot find the eth0 device, and/etc/sysconfig/network-scripts/contains only the ifcfg-lo file, without the ifcfg-eth0. Temporary Solution 1: Use the command ifconfigeth0192.168.1.x to set the IP address of eth0. this method is only for temporary purposes and will be lost after the system restarts.

Problem description:

The ifconfig command cannot find the eth0 device, and the/etc/sysconfig/network-scripts/contains only the ifcfg-lo file, without the ifcfg-eth0.

Temporary Solution 1:

Run the ifconfig eth0 192.168.1.x command to set the eth0 IP address. this method is only a temporary solution. after the system is restarted, it becomes invalid.

Permanent Solution 2:

1. create a ifcfg-eth0 file under the/etc/sysconfig/network-scripts/directory;

2. correctly set the DEVICE, BOOTPROTO, ONBOOT, IPADDR, GATEWAY, DNS1, DOMAIN, NETMASK, NETWORK, NAME and so on of the ifcfg-eth0, such:

DEVICE = eth0 physical DEVICE name

IPADDR = 192.168.1.x IP address

NETMASK = 255.255.255.0 subnet mask

NETWORK = 192.168.1.0 indicates the NETWORK, which is automatically calculated using the IP address and subnet mask.

GATEWAY = 192.168.1.1 GATEWAY address

BROADCAST = 192.168.1.255 BROADCAST address, automatically calculated by IP address and subnet mask

ONBOOT = [yes | no] whether to activate the device during boot

USERCTL = [yes | no] can a non-ROOT user control the device?

BOOTPROTO = [none | static | bootp | dhcp] Protocol not used during boot | static allocation | BOOTP protocol | dhcp protocol

HWADDR = 00: 13: D3: 27: 9F: 80 MAC address

NAME = eth0 NAME

3. after the above settings, it can be successful under normal circumstances. if there is still a problem, in the file/etc/rc. d/rc. add ifup eth0 (/etc/rc. the local script is executed after all other initialization scripts are executed ).

4. restart your computer. OK.

Other network control commands:

Ifdown eth0, ifconfig eth0 down // disable the network

Ifup eth0, ifconfig eth0 up // enable the network

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Set the DNS configuration file location/etc/resolv. conf

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Service network start // start a network service

Service network stop // stop a network service

Srvice network restart // restart the network service

Service network status // view the network service status