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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linuxbasicsforhackers

Removing a File
To remove a file, you can simply use the 
rm
command, like so:
kali >rm newfile2
If you now do a long listing on the directory, you can confirm that the 
file has been removed.
Removing a Directory
The command for removing a directory is similar to the 
rm
command for 
removing files but with 
dir
(for directory) appended, like so:
kali >rmdir newdirectory
rmdir:failed to remove 'newdirectory': Directory not empty
It’s important to note that 
rmdir
will not remove a directory that is not 
empty, but will give you a warning message that the “directory is not empty,” 
as you can see in this example. You must first remove all the contents of the 
directory before removing it. This is to stop you from accidentally deleting 
objects you didn’t intend to delete.
If you do want to remove a directory and its content all in one go, you 
can use the 
-r
switch after 
rm
, like so:
kali >rm -r newdirectory
Just a word of caution, though: be wary of using the 
-r
option with 
rm

at least at first, because it’s very easy to remove valuable files and directories 
by mistake. Using 
rm -r
in your home directory, for instance, would delete 
every file and directory there—probably not what you were intending.


Getting Started with the Basics
17
Go Play Now!
Now that you have some basic skills for navigating around the filesystem, 
you can play with your Linux system a bit before progressing. The best way 
to become comfortable with using the terminal is to try out your newfound 
skills right now. In subsequent chapters, we will explore farther and deeper 
into our hacker playground.
E XERCISES
Before you move on to Chapter 2, try out the skills you learned from this chapter 
by completing the following exercises:
1. Use the ls command from the root (/) directory to explore the directory 
structure of Linux. Move to each of the directories with the cd command 
and run pwd to verify where you are in the directory structure.
2. Use the whoami command to verify which user you are logged in as.
3. Use the locate command to find wordlists that can be used for password 
cracking.
4. Use the cat command to create a new file and then append to that file. 
Keep in mind that > redirects input to a file and >> appends to a file.
5. Create a new directory called hackerdirectory and create a new file in 
that directory named hackedfile. Now copy that file to your /root directory 
and rename it secretfile.




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