Author: Sahil Suri

Introduction If you’ve been working with Linux/UNIX operating systems for a while then you would’ve probably used the ifconfig command very frequently. In case you are new to Linux operating systems it’s still likely that you’ve used or at least heard of the ifconfig command at some point in your Linux user experience. The ifconfig command has been around for years and was primarily used to view the network interface cards on your system and their corresponding network information. The ifconfig command was also used to modify properties of network interfaces i.e. change the IP addresses assigned to them, assign multiple IP addresses etc. In this article we will not be covering the ifconfig command but will instead focus on it’s enhanced and more feature rich replacement found on almost all modern Linux distributions. The command we are referring to here is the ip command. The ip command has deprecated the ifconfig command to the extent that ifconfig is not even installed by default on RHEL 7/Centos 7 distributions. Let’s now take a look at some examples to familiarize ourselves with the ip command Example 1: Display network information for all network interfaces To view IP address information for all network interfaces we use the ‘ip address show’ command. [root@linuxnix ~]# ip address show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00...