Linux Shell Scripting Cookbook - Third Edition

Getting ready

A network interface physically connects a machine to a network, either with a wire or a Wi-Fi link. Linux denotes network interfaces using names such as eth0, eth1, or enp0s25 (referring to Ethernet interfaces). Other interfaces, namely usb0, wlan0, and tun0, are available for USB network interfaces, wireless LAN, and tunnels, respectively.

In this recipe, we will use these commands: ifconfig, route, nslookup, and host.

The ifconfig command is used to configure and display details about network interfaces, subnet mask, and so on. It should be available at /sbin/ifconfig.