Linux Fundamental Part 3Tryhackme Walkthrough/Writeup

3 min readSep 4, 2022

TryHackMe Linux Fundamentals Part 3 WriteUp/Walkthrough

Beginner-friendly Writeup/Walkthrough of the room Linux Fundamentals Part 3 from TryHackMe with answers.

The Contents of the Room:

Task 1: Introduction

# Let’s proceed!

Task 2: Deploy Your Linux Machine

Deploy the AttackBox and login into the machine using “ssh tryhackme@machine_ip”, enter the password “tryhackme”.

# I’ve logged into the Linux Fundamentals Part 3 machine using SSH and have deployed the AttackBox successfully!

Task 3: Terminal Text Editors

Create a file using Nano by using the command “nano new_file_name”.

# Create a file using Nano

# Edit “task3” located in “tryhackme”’s home directory using Nano. What is the flag?

Use the command “nano task3” to open the file “task3” and see the flag.

Answer: THM{TEXT_EDITORS}

Task 4: General/Useful Utilities

# Ensure you are connected to the deployed instance (10.10.122.29)

# Now, use Python 3’s “HTTPServer” module to start a web server in the home directory of the “tryhackme” user on the deployed instance.

Use the command “python3 -m http.server” ti start the web server.

# Download the file http://10.10.122.29:8000/.flag.txt onto the TryHackMe AttackBox

# What are the contents?

Use the command “wget machine_ip” to download the file and then “cat .flag.txt” to output the flag.

# Create and download files to further apply your learning — see how you can read the documentation on Python3’s “HTTPServer” module.

# Use Ctrl + C to stop the Python3 HTTPServer module once you are finished.

Task 5: Processes 101

# Read me!

# If we were to launch a process where the previous ID was “300”, what would the ID of this new process be?

# If we wanted to cleanly kill a process, what signal would we send it?

# Locate the process that is running on the deployed instance (MACHINE_IP). What flag is given?

# What command would we use to stop the service “myservice”?

# What command would we use to start the same service on the boot-up of the system?

# What command would we use to bring a previously backgrounded process back to the foreground?

Task 6: Maintaining Your System: Automation

#Ensure you are connected to the deployed instance and look at the running crontabs.

#When will the crontab on the deployed instance (MACHINE_IP) run?

Task 7: Maintaining Your System: Package Management

# Since TryHackMe instances do not have an internet connection…this task only requires you to read through the material.

Task 8: Maintaining Your System: Logs

#Look for the apache2 logs on the deployable Linux machine

Use the command “cd /var/log/apache2” to navigate to the folder where apache2 logs are store.

#What is the IP address of the user who visited the site?

Use the command “cat access.log.1” to output the logs and see the ip address of the user who visited the site.

#What file did they access?

Also on the same file you will see what file they accessed.

Task 9: Conclusions & Summaries

#Terminate the machine deployed in this room from task 2.

#Continue your learning in other Linux-dedicated rooms

#Join Linux Fundamentals Part 1

#Join Linux Fundamentals Part 2

Thank you for checking out my writeup!