FREE Cybersecurity Udemy Courses for Beginners

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1. Cyber Security Awareness Training Course For Beginners
2. Cybersecurity 101: Adopting A Security Mindset
3. How does the Internet work & Networking Crash Course
4. Linux Command Line Course for Cyber Security and Pentesting
5. Cybersecurity Prep Course for Absolute Beginners

You Should Know:

Essential Linux Commands for Cybersecurity

 Network Scanning 
nmap -sV -A target.com 
sudo tcpdump -i eth0 -w capture.pcap

File Permissions & Security 
chmod 600 sensitive_file.txt  Restrict access 
chown root:root critical_script.sh

Log Analysis 
grep "Failed password" /var/log/auth.log 
journalctl -u ssh --no-pager | grep "authentication failure"

Process Monitoring 
ps aux | grep suspicious_process 
kill -9 $(pgrep malware) 

Windows Security Commands

 Check open ports 
netstat -ano | findstr LISTENING

Verify digital signatures 
sigverif

Disable suspicious services 
sc stop "MaliciousService" 
sc delete "MaliciousService"

Enable Windows Defender 
Set-MpPreference -DisableRealtimeMonitoring $false 

Python Script for Port Scanner

import socket 
def scan_port(ip, port): 
try: 
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
sock.settimeout(1) 
result = sock.connect_ex((ip, port)) 
if result == 0: 
print(f"Port {port} is open") 
sock.close() 
except Exception as e: 
print(f"Error: {e}")

scan_port("127.0.0.1", 80) 

What Undercode Say:

Cybersecurity fundamentals are critical in today’s digital landscape. Mastering Linux commands, network analysis, and scripting can significantly enhance your defensive and offensive security skills. Always verify downloaded tools, monitor system logs, and practice ethical hacking in controlled environments.

Prediction:

As cyber threats evolve, demand for skilled professionals will surge. Certifications (like CEH, CISSP) and hands-on labs will dominate hiring criteria.

Expected Output:

  • Linux command proficiency
  • Basic Python scripting for automation
  • Network defense techniques
  • Windows security hardening

References:

Reported By: Ouardi Mohamed – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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