Tryhackme Linux Fundamentals Part 1 Walkthrough

 

Hi Hackers, in this blog post we will solve the Tryhackme room Linux Fundamentals Part 1. This is a practice room for beginners who want to learn Linux. Let's begin.

Room Link:

TryHackMe | Linux Fundamentals Part 1

Before we get into the room, if you want some basic knowledge of Linux commands, you can read my another post for Linux beginners. Here is the link:

Basic Linux Commands For Beginners 

Spoiler Alert: If you are stuck, then this post is for you. But if you haven't tried yet, I strongly suggest to try the room by yourself. And then come back to the post for solution or hint.

Introduction:

Question 1: Let's get started!

Answer : No answer needed.

A Bit of Background on Linux:

Question 2: What year was the first release of a Linux Operating System?

Answer : 1991

Interacting With Your First Linux Machine (In-Browser):

Question 3: I've deployed my first Linux machine!

Answer : No answer needed.

Running your First few commands:

echo            🠊    Output any text we provide

whoami       🠊    Find out what user we're currently logged in as!

Question 4: If you wanted to output the text "TryHackMe", what would our command be?

Answer : echo TryHackMe

Question 5: What is the username of who you're logged in as on your deployed Linux machine?

Answer : tryhackme

Interacting With the Filesystem!:

ls          🠊     listing

cd         🠊     change directory

cat        🠊     concatenate

pwd      🠊     print working directory

Question 6: On the Linux machine that you deploy, how many folders are there?

Answer : 4

Question 7: Which directory contains a file?

Answer : folder4

Question 8: What is the contents of this file?

Answer : Hello World

Question 9: Use the cd command to navigate to this file and find out the new current working current directory. What is the path?

Answer : /home/tryhackme/folder4

Searching for Files:

Sometimes you may not find what you're looking for. You can use find command. Suppose you're looking for passwords.txt file. Then the command will be-

$find -name passwords.txt

Again, if you have a big file and want to save your precious time, you should use grep. 

grep and find are important commands for a cyber security researcher.

Question 10: Use grep on "access.log" to find the flag that has a Prefix of "THM". What is the flag?

Answer : THM{ACCESS}

Question 11: And I still haven't found what I'm looking for.

Answer : No Answer Needed.

An Introduction to Shell Operators:

&           🠊  This operator allows you to run commands in the background of your terminal.

&&         🠊  This operator allows you to combine multiple commands together in one line of your terminal.

>            🠊  This operator is a redirector - meaning that we can take the output from a command (such as using cat to output a file) and direct it elsewhere.

>>          🠊  This operator does the same function of the > operator but appends the output rather than replacing (meaning nothing is overwritten).

Question 12: If we wanted to run a command in the background, What operator would we want to run?

Answer : &

Question 13: If I wanted to replace the contents of a file named "passwords" with the word "password123", what would my command be?

Answer : echo password123 > passwords

Question 14: Now If I wanted to add "tryhackme" to this file named "passwords" but also keep "passwords123", what would my command be?

Answer : echo tryhackme >> passwords

Question 15 : Now use the deployed Linux machine to put these into practice.

Answer : No answer needed.

Conclusions and Summaries:

This was the first part of Linux fundamental. There is a long way to go. But this is a good start. You get a good hold of something if you know the basic. Happy Hacking!!!!!

Linux Fundamentals Part 2 room link:

TryHackMe | Linux Fundamentals Part 2