How to add ip's to an interface in Linux

Find out what you interface is labeled using either the ifconfig or "ip a" command.  

Example using ifconfig: 

enp3s0f0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 1.1.1.1  netmask 255.255.255.0  broadcast 1.1.1.255
        ether 5c:b9:01:79:7e:18  txqueuelen 1000  (Ethernet)
        RX packets 272893777  bytes 85125059397 (79.2 GiB)
        RX errors 411  dropped 20  overruns 0  frame 0
        TX packets 163007862  bytes 85194460331 (79.3 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Example using "ip a":

root@194:~# ip a | more 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 2: eno1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000 link/ether 34:17:eb:e7:d4:ee brd ff:ff:ff:ff:ff:ff 3: enp3s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 5c:b9:01:79:7e:18 brd ff:ff:ff:ff:ff:ff inet 1.1.1.1/24 brd 194.34.107.255 scope global enp3s0f0 valid_lft forever preferred_lft forever

You can see the interface is labeled "enp3s0f0".

So to bind an ip to this interface, you simply need to do:

ip a a 2.2.2.2/32 dev enp3s0f0

To make the ip binding persistent across reboots, make sure to add that to /etc/rc.local so it would look like this:

#!/bin/bash
ip a a 2.2.2.2/32 dev enp3s0f0


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