L in u X ba sics for h acke rs g e t t I n g s t a r t e d w I t h

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Summary
Any hacker needs some basic Linux networking skills to connect, analyze, 
and manage networks. As you progress, these skills will become more and 
more useful for doing reconnaissance, spoofing, and connecting to target 
systems.
E XERCISES
Before you move on to Chapter 4, try out the skills you learned from this chapter 
by completing the following exercises:
1. Find information on your active network interfaces.
2. Change the IP address on eth0 to 192.168.1.1.
3. Change your hardware address on eth0.
4. Check whether you have any available wireless interfaces active.
5. Reset your IP address to a DHCP-assigned address.
6. Find the nameserver and email server of your favorite website.
7. Add Google’s DNS server to your /etc/resolv.conf file so your system 
refers to that server when it can’t resolve a domain name query with 
your local DNS server.

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4
A D D I N G A N D R E M O V I N G 
S O F T W A R E
One of the most fundamental tasks in 
Linux—or any operating system—is add-
ing and removing software. You’ll often 
need to install software that didn’t come with 
your distribution or remove unwanted software so it 
doesn’t take up hard drive space.
Some software requires other software to run, and you’ll sometimes 
find that you can download everything you need at once in a software package, 
which is a group of files—typically libraries and other dependencies—that 
you need for a piece of software to run successfully. When you install a 
package, all the files within it are installed together, along with a script 
to make loading the software simpler.
In this chapter, we examine three key methods for adding new soft-
ware: apt package manager, GUI-based installation managers, and git.

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