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Linux is a powerful and versatile operating system widely used in cybersecurity, IT, and development. Mastering Linux commands and tools is essential for professionals in these fields. Below are key Linux concepts, commands, and practical examples to enhance your skills.
You Should Know:
Basic Linux Commands
1. `ls` – List directory contents
ls -la Show hidden files with details
2. `cd` – Change directory
cd /var/log Navigate to log directory
3. `pwd` – Print working directory
pwd
4. `mkdir` – Create a directory
mkdir new_folder
5. `rm` – Remove files/directories
rm -rf old_folder Force delete a directory
File Manipulation
6. `cat` – Display file content
cat /etc/passwd
7. `grep` – Search text in files
grep "root" /etc/passwd
8. `chmod` – Change file permissions
chmod 755 script.sh Give execute permissions
9. `chown` – Change file ownership
chown user:group file.txt
System & Network Commands
10. `ps` – List running processes
ps aux | grep "nginx"
11. `top` / `htop` – Monitor system resources
htop
12. `netstat` – Network statistics
netstat -tuln List open ports
13. `ifconfig` / `ip` – Network interface configuration
ip a Show IP addresses
14. `ssh` – Secure remote login
ssh [email protected]
Cybersecurity & Kali Linux Tools
15. `nmap` – Network scanning
nmap -sV 192.168.1.1
16. `metasploit` – Penetration testing framework
msfconsole
17. `wireshark` – Packet analysis
wireshark &
18. `hydra` – Password cracking
hydra -l admin -P passwords.txt ssh://192.168.1.1
Automation & Scripting
19. Bash Scripting
!/bin/bash echo "Hello, World!"
20. `cron` – Schedule tasks
crontab -e Edit cron jobs
What Undercode Say
Linux is the backbone of cybersecurity, cloud computing, and IT infrastructure. Mastering these commands will significantly improve efficiency in system administration, ethical hacking, and automation. Practice in a lab environment (like Kali Linux or Ubuntu) to reinforce skills.
Expected Output:
A structured guide with practical Linux commands for cybersecurity, IT, and system administration.
For more Linux learning resources, check out:
References:
Reported By: Davidbombal Linux – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
