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THM-Linux-Fundamentals-1

3 min read

THM Linux Fundamentals 1

TryHackMe | Login

Michael Jack | 06/2022

Task 1 - Intro

Welcome to the first part of the “Linux Fundamentals” room series. You’re most likely using a Windows or Mac machine, both are different in visual design and how they operate. Just like Windows, iOS and MacOS, Linux is just another operating system and one of the most popular in the world powering smart cars, android devices, supercomputers, home appliances, enterprise servers, and more.

We’ll be covering some of the history behind Linux and then eventually starting your journey of being a Linux-wizard! This room will have you:

  • Running your very first commands in an interactive Linux machine in your browser
  • Teaching you some essential commands used to interact with the file system
  • Introduce you to how users and groups work on Linux (and what this means for us as penetration testers)

Task 2 - A Bit of Background on Linux

What year was the first release of a Linux OS?

1991

Task 3 - Interacting With Your First Linux Machine (In-Browser)

Introduces how to create and access a THM machine in the browser.

Task 4 - Running Your First Few Commands

Introduces basic commands and how we interact with the teminal.

If we wanted to output the text “TryHackMe”, what would our command be?

echo TryHackMe

What is the username of who you’re logged in as on your deployed Linux machine?

~$ whoami
tryhackme

Task 5 - Interacting With The Filesystem!

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

4

Which directory contains a file?

folder4

What is the contents of this file?

Hello World!

What is the path to that directory?

/home/tryhackme/folder4

Task 6 - Searching for FIles

Use grep on access.log to find the flag.

THM{ACCESS}

Task 7 - An Introduction to Shell Operators

If we wanter to run a command in the background, what operatory would we use?

&

If I wanted to replace the contents of a file named “passwords” with the word “password123”, what would my command be?

echo password123 > passwords

Now if I wanted to add “tryhackme” to this file named “passwords” but also keep “passwords123”, what would my command be?

echo tryhackme >> passwords

Task 8 - Conclusions & Summaries

To quickly recap, we’ve covered the following:

  • Understanding why Linux is so commonplace today
  • Interacting with your first-ever Linux machine!
  • Ran some of the most fundamental commands
  • Had an introduction to navigating around the filesystem & how we can use commands like find and grep to make finding data even more efficient!
  •  Power up your commands by learning about some of the important shell operators.

THM-Linux-Fundamentals-2

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