Linux Fundamentals Part 3

Introduction

• Final part of the Linux Fundamentals series on TryHackMe.
• Focus on common utilities for daily use.
• Key topics: automation, package management, and logging.

Task 1: Introduction

• Overview of utilities and applications.
• Emphasis on advancing Linux knowledge.

Task 2: Deploying the Machine

• SSH into target machine using provided credentials.
• Reminder: Use the correct IP address for your session.

Task 3: Terminal Text Editors

Nano

• Basic command: nano filename
• Easy to use for simple text editing.
• Key features: search (Ctrl + W), copy/paste, line number navigation.

Vim

• Advanced text editor with customizability and syntax highlighting.
• Suitable for developers.
• More complex but powerful tool.

Task 4: General/Useful Utilities

Downloading Files

• wget command for downloading via HTTP.

Secure Copy (SCP)

• Transfer files securely over SSH.
• Syntax: scp source destination

Serving Files with Python

• Use python3 -m http.server to serve files over HTTP.
• Default port: 8000

Task 5: Processes 101

Viewing Processes

• ps and ps aux to list processes.
• top provides real-time stats.

Managing Processes

• kill command with various signals (e.g., SIGTERM, SIGKILL).
• systemctl for starting/stopping services.

Backgrounding and Foregrounding

• Background with & or Ctrl + Z.
• Foreground with fg.

Task 6: System Automation

Crontabs

• Schedule tasks using crontab -e.
• Syntax for scheduling includes minute, hour, day, month, and week.

Task 7: Package Management

Repositories

• Use add-apt-repository to add new sources.
• apt command for installing/removing software.

Task 8: System Logging

Log Files

• Stored in /var/log.
• Important for monitoring system health and security.

Conclusion

• Completion of the Linux Fundamentals module.
• Encouragement for further practice and exploration of additional TryHackMe rooms.