Get all our network configuration with commands

Either because we are managing a server or because we do not yet have a graphical environment, there are times when we need to know all the network data that the computer to which we are connected has, here I will explain how to obtain this data.

IP adress

A simple command can tell us our IP, I mean: ifconfig

ifconfig

It will show us something like this:

As you can see, all network interfaces appear, in the 2nd line of each interface we see something like: «internet 192.168.1.5»… Inet is the IP address, for example, if I do a grep filtering inet I can show only the IPs:

sudo ifconfig | grep inet

It would show us our IPv4 and IPv6 IPs.

MAC

The same command allows us to know our MAC address, we can see it in the line that begins with "ether", we can still use a grep to filter by ether and that only our MACs appear:

sudo ifconfig | grep ether

DNS server

To know our DNS server we can see the content of the /etc/resolv.conf file:

cat /etc/resolv.conf

There we will see the domain of our network (in case we have one in the LAN) or the IP of the DNS server that we use.

Gateway or Gateway

Knowing our gateway is just as easy, we will use:

ip route show

We will see that several lines may appear, but the (generally) first line contains our gateway at the beginning, it is the line that begins with default

Anyway ... obviously you can use grep again to filter by default:

ip route show | grep default

And ... getting more exquisite we can use awk to show only the 3rd column, that of the IP:

ip route show | grep default | awk {'print $3'}

But hey, this is to get us detailed 😀

Hostname or Computer Name

Simple, very simple ... just run: hostname

hostname

The end!

So far the post goes, I do not know if I have any pending configuration ... if so, share the command to show it in a terminal 😉

Enjoy!