Configuring a new interface

Start by creating a configuration file for eth2:

$ sudo touch /etc/sysconfig/network-scripts/ifcfg-eth2

Next, populate it using the following:

$ sudo tee /etc/sysconfig/network-scripts/ifcfg-eth2 << HERE 
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.168.44.10
NETMASK=255.255.255.0
DEVICE=eth2
PEERDNS=no
HERE
The tee command is used here. It enables reading from standard input and outputting to a destination of our choosing, in this case, a file.

Now, restart your interface as an individual:

$ sudo ifdown eth2
$ sudo ifup eth2

Alternatively, restart networking in general:

$ sudo systemctl restart network
It's generally a good rule of thumb to be the least disruptive when working with components that make up a greater whole. Even in a dev environment, it's a good habit to get into.
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