The Network Administration Tool ( system-config-network) is an easy way to make changes to the various network interface configuration files (refer to Chapter 14, Network Configuration for detailed instructions on using this tool). For example, the ifcfg-eth0 file for an interface using DHCP looks different because IP information is provided by the DHCP server: The values required in an interface configuration file can change based on other values. The following is a sample ifcfg-eth0 file for a system using a fixed IP address: Because each device has its ownĬonfiguration file, an administrator can control how each interface functions individually. There are multiple ifcfg-eth files (where is a unique number corresponding to a specific interface).
One of the most common interface files is ifcfg-eth0, which controls the first Ethernet network interface card or NIC in the system.
