15 Useful “ifconfig” Commands to Configure Network Interface in Linux

ifconfig in short “interface configuration” utility for system/network administration in Unix/Linux operating systems to configure, manage and query network interface parameters via command line interface or in a system configuration scripts.

The “ifconfig” command is used for displaying current network configuration information, setting up an ip address, netmask or broadcast address to an network interface, creating an alias for network interface, setting up hardware address and enable or disable network interfaces.

15 Useful ifconfig Commands

This article covers “15 Useful “ifconfig” Commands” with their practical examples, that might be very helpful to you in managing and configuring network interfaces in Linux systems.

Update : The networking command ifconfig is deprecated and replaced by ip command (Learn 10 Examples of IP Command) in most Linux distributions.

Don’t Miss: ifconfig vs ip: What’s Difference Between Them

1. View All Network Setting

The “ifconfig” command with no arguments will display all the active interfaces details. The ifconfig command also used to check the assigned IP address of an server.

[root@tecmint ~]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0B:CD:1C:18:5A
inet addr:172.16.25.126  Bcast:172.16.25.63  Mask:255.255.255.224
inet6 addr: fe80::20b:cdff:fe1c:185a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:2341604 errors:0 dropped:0 overruns:0 frame:0
TX packets:2217673 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:293460932 (279.8 MiB)  TX bytes:1042006549 (993.7 MiB)
Interrupt:185 Memory:f7fe0000-f7ff0000
lo        Link encap:Local Loopback
inet addr:127.0.0.1  Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING  MTU:16436  Metric:1
RX packets:5019066 errors:0 dropped:0 overruns:0 frame:0
TX packets:5019066 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2174522634 (2.0 GiB)  TX bytes:2174522634 (2.0 GiB)
tun0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.1.1.1  P-t-P:10.1.1.2  Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

2. Display Information of All Network Interfaces

The following ifconfig command with -a argument will display information of all active or inactive network interfaces on server. It displays the results for eth0, lo, sit0 and tun0.

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