Linux IP Managing

Introduction

In the remote, mystical Supranatural Academy, where tomorrow's cyber-wizards are trained, Professor Lynux is renowned for being the master of networks and systems. His teachings are crucial for any aspiring IT mage who wishes to control the flow of digital information.

In a world where magic intertwines with technology, the latest challenge from Professor Lynux has left the students buzzing with anticipation. A series of enchanted networks whose IP configurations are in disarray are threatening the digital archives. They hold the key to critical spells and potions and must be made accessible for the upcoming alchemy assessments.

Your task, as Professor Lynux's top apprentice, is to dive into the Linux systems and bring order to the chaos. Through a series of hands-on exercises, you will master the art of IP management using the ip command, learning skills that will make you a networking sorcerer!

Skills Graph

Configuring IP Addresses

In this step, you will learn how to assign IP addresses to network interfaces. You'll start by finding out which network interfaces are available on your system. Then you'll configure an IP address to one of the available interfaces. Remember, in the magic-infused Linux systems at Supranatural Academy, getting the address right means ensuring the data flow is properly channeled!

First, create a new directory named network_conf within the ~/project directory:

mkdir -p ~/project/network_conf

Then, check the available network interfaces using:

ip link show

Next, choose an interface that is currently inactive (e.g., eth0) and assign it an IP address. Here's an example to assign the IP address 192.168.1.10/24 to eth0:

sudo ip addr add 192.168.1.10/24 dev eth0

After applying the IP address, you can check the interface's configuration with:

ip addr show dev eth0

An example of an expected result is:

3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 52:54:00:12:34:56 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.10/24 scope global eth1

Configuring Routing

Once you have assigned an IP address to an interface, it is time to ensure that the data can find its path through the complex network of the academy. In this step, you will configure routing so that your system knows where to send the traffic.

Create a routing configuration file inside network_conf directory you created earlier:

touch ~/project/network_conf/routing.sh

Open the file routing.sh in your favorite text editor and add the following script to create a new route:

#!/bin/bash
sudo ip route add 192.168.2.0/24 via 192.168.1.1 dev eth0

Make the script executable:

chmod +x ~/project/network_conf/routing.sh

After that, run the script to apply the route:

~/project/network_conf/routing.sh

Check the current route table with:

ip route show

You should see something like this:

default via 172.17.0.1 dev eth0
172.17.0.0/16 dev eth0 proto kernel scope link src 172.17.0.3
192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.10
192.168.2.0/24 via 192.168.1.1 dev eth0

Summary

In this lab, you ventured into the magical yet structured world of Linux IP management. Crafting this lab required a blend of creativity to embrace the Supranatural Academy theme and technical precision to guide novices through the steps of configuring IP addresses and routing. This lab offers not only a foundational understanding of networking but also instills confidence as you wield the ip command line utility to control and direct the flow of data within Linux environments. My aim was to create an engaging and informative experience that draws the learner into a fantastique ambience while grounding them firmly in real-world skills. The steps designed here ensure that by the lab's end, you will feel empowered to conjure network configurations with the elegance and accuracy of a true IT mage!