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This is an open-source eBook with 101 Linux commands that everyone should know. No matter if you are a DevOps/SysOps engineer, developer, or just a Linux enthusiast, you will most likely have to use the terminal at some point in your career.
🔗 Download Here: https://lnkd.in/dPQ8aY7e
You Should Know:
Essential Linux Commands for Cybersecurity & IT
1. File Operations
cp file.txt /backup/ Copy file mv old.txt new.txt Rename file rm -rf /tmp/unwanted/ Force-delete directory chmod 600 secret.txt Restrict file permissions
2. System Monitoring
top Real-time process monitor htop Enhanced system monitor df -h Check disk space free -m Check RAM usage
3. Networking & Security
netstat -tuln List open ports ss -lntp Modern alternative to netstat nmap -sV 192.168.1.1 Scan for services tcpdump -i eth0 port 80 Capture HTTP traffic
4. User & Permissions
sudo adduser newuser Create a new user passwd username Change password usermod -aG sudo username Grant sudo access chown user:group file.txt Change file ownership
5. Log Analysis
tail -f /var/log/syslog Follow system logs grep "error" /var/log/auth.log Search for errors journalctl -xe View systemd logs
6. Automation & Scripting
crontab -e Edit cron jobs bash script.sh Execute a Bash script nohup ./long_process.sh & Run process in background
7. Package Management
apt update && apt upgrade Update Debian/Ubuntu yum install package Install on CentOS/RHEL snap install chromium Install via Snap
What Undercode Say:
Mastering Linux commands is crucial for cybersecurity, DevOps, and system administration. The terminal provides granular control over systems, enabling automation, security hardening, and troubleshooting.
🔹 Pro Tip: Combine commands with pipes (|) for powerful operations:
cat logs.txt | grep "FAILED" | sort | uniq -c
🔹 For Security Analysts:
sudo fail2ban-client status Check brute-force protection sudo ufw enable Enable firewall
🔹 For Developers:
git clone https://repo.git Clone a repository docker ps -a List Docker containers
🔹 For SysAdmins:
rsync -avz /src/ user@dest:/backup/ Secure file sync ssh-keygen -t rsa Generate SSH keys
Expected Output:
A powerful Linux command-line skillset enhances efficiency in IT, cybersecurity, and cloud computing. Practice these commands in a safe lab environment before production use.
🔗 Reference: 101 Linux Commands eBook
References:
Reported By: Https: – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
