Ethernet Interfaces. One of the most common interface files is ifcfg-eth0, which controls the first Ethernet network interface card or NIC in the system. In a system with multiple NICs, there are multiple ifcfg-eth files (where is a unique number corresponding to a specific interface).
What does HWaddr mean?
HWaddr is hardware address of the ethernet interface (also known as MAC address). inet addr is IPv4 address assigned to the interface.
What is Ifcfg in Linux?
Each Linux network interface has an ifcfg configuration file located in /etc/sysconfig/network-scripts. The device name is added to the end of the filename. So, for example, the configuration file for the first Ethernet interface is called ifcfg-eth0.
How do I set default gateway in Ifcfg-eth0?
Change a Default Gateway Permanently Another option to set a default gateway persistently on CentOS is to edit /etc/sysconfig/network-scripts/ifcfg- , and add GATEWAY= there. If the default interface is eth0 , you will need to edit /etc/sysconfig/network-scripts/ifcfg-eth0 .
How do I set up Ifcfg eth0?
Set a Static IP Address
- Open the configuration file for the first network interface, eth0, into a text editor. vi /etc/sysconfig/network-scripts/ifcfg-eth0.
- Modify the configuration file to look similar to the one below.
- Save your changes and exit the text editor.
- Restart the network service.
What does eth0 mean?
first Ethernet interface
eth0 is the first Ethernet interface. (Additional Ethernet interfaces would be named eth1, eth2, etc.) This type of interface is usually a NIC connected to the network by a category 5 cable. lo is the loopback interface. This is a special network interface that the system uses to communicate with itself.
What is Tx packet and RX packet?
Tx packets – displays the number of transmitted packets. Rx packets – displays the number of received packets. Tx retry, % – displays the amount of retried packets (in percentages). Rx drop, % – displays the amount of dropped packets (in percentages).
How do I save Ifcfg eth0?
Edit the file “/etc/sysconfig/network-scripts/ifcfg-eth0” and replace the ip address. After you do this you may will need to run ifdown followed by ifup or “service network restart” (restarts all interfaces).
How do I permanently set default gateway in Linux?
Debian / Ubuntu Linux Setting a Default Gateway
- ip command to set a default router to 192.168.1.254. Login as the root and type:
- route command to set a default router to 192.168. 1.254.
- Save routing information to a configuration file /etc/network/interfaces. Open /etc/network/interfaces file.
How do I set default gateway in Linux?
Type. sudo route add default gw IP Address Adapter . For example, to change the default gateway of the eth0 adapter to 192.168. 1.254, you would type sudo route add default gw 192.168.
How do I edit Ifcfg eth0?
