Tryhackme – Linux Fundamentals Part 3

In this walk through, we will be going through the Linux Fundamentals Part 3 from Tryhackme. This room covers the terminal text editors, general utilities, Linux processes, and more. On that note, let’s get started.

Task 1 – Introduction

Task 2 – Deploy Your Linux Machine

Task 3 – Terminal Text Editors

Question 1 – Create a file using Nano

Done

Question 2 – Edit “task3” located in “tryhackme”‘s home directory using Nano. What is the flag?

THM{TEXT_EDITORS}

Task 4 – General/Useful Utilities

Question 1 –Ensure you are connected to the deployed instance (10.10.1.43)

Done

Question 2 – Now, use Python 3’s “HTTPServer” module to start a web server in the home directory of the “tryhackme” user on the deployed instance.

Done

Question 3 – Download the file http://10.10.1.43:8000/.flag.txt onto the TryHackMe AttackBox

THM{WGET_WEBSERVER}

Question 4 – 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.

Done

Task 5 – Processes 101

Question 1 – Read me!

Done

Question 2 – If we were to launch a process where the previous ID was “300”, what would the ID of this new process be?

301

Question 3 – If we wanted to cleanly kill a process, what signal would we send it?

SIGTERM

Question 4 – Locate the process that is running on the deployed instance (10.10.195.122). What flag is given?

THM{PROCESSES

Question 5 – What command would we use to stop the service “myservice”?

systemctl myservice stop

Question 6 – What command would we use to start the same service on the boot-up of the system?

systemctl myservice enable

Question 7 – What command would we use to bring a previously backgrounded process back to the foreground?

fg

Task 6 – Maintaining Your System: Automation

Question 1 – Ensure you are connected to the deployed instance and look at the running crontabs.

Done

Question 2 – When will the crontab on the deployed instance (10.10.195.122) run?

@reboot

Task 7 – Maintaining Your System: Package Management

Question 1 – Since TryHackMe instances do not have an internet connection…this task only requires you to read through the material.

Done

Task 8 – Maintaining Your System: Logs

Question 1 – Look for the apache2 logs on the deployable Linux machine

Done

Question 2 – What is the IP address of the user who visited the site?

10.9.232.111

Question 3 – What file did they access?

catsanddogs.jpg

Task 9 – Conclusions & Summaries

Also Read: Tryhackme – Linux Fundamentals Part 1

So that was “Linux Fundamentals Part 3” for you. We looked into terminal text editors, general utilities, Linux processes, maintaining automation, packet management and much more. Solved a bunch of questions to practice the commands on the terminal. This is the third and final part of the three parts series on Tryhackme and this was the last one. On that note, allow me to leave, will meet you in the next one, but remember to “Keep Hacking”.