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Here are some essential Linux commands for system management, development, and file navigation:
File & Directory Operations
– `ls` – List directory contents
– `cd` – Change directory
– `pwd` – Print working directory
– `mkdir` – Create a directory
– `rm` – Remove files/directories (-r for recursive deletion)
– `cp` – Copy files/directories
– `mv` – Move or rename files
– `touch` – Create an empty file
System Monitoring & Process Management
– `top` – Display running processes
– `htop` – Interactive process viewer
– `ps` – Report process status (ps aux for detailed view)
– `kill` – Terminate a process (kill -9 PID for force kill)
– `df` – Disk space usage (df -h for human-readable format)
– `free` – Memory usage (free -m for MB)
Networking Commands
– `ifconfig` / `ip a` – Network interface details
– `ping` – Check connectivity (ping google.com)
– `netstat` – Network statistics (netstat -tuln for listening ports)
– `ssh` – Remote login (ssh user@host)
– `scp` – Secure file transfer (scp file user@host:/path)
Text & File Manipulation
– `cat` – Display file content
– `grep` – Search text (grep "pattern" file.txt)
– `sed` – Stream editor (sed 's/old/new/g' file.txt)
– `awk` – Text processing (awk '{print $1}' file.txt)
– `head` / `tail` – View first/last lines (tail -f logfile for real-time logs)
Permissions & Ownership
– `chmod` – Change permissions (chmod 755 file.sh)
– `chown` – Change ownership (chown user:group file)
Package Management
– `apt` (Debian/Ubuntu) – `apt update && apt upgrade`
– `yum` (RHEL/CentOS) – `yum update`
– `dnf` (Fedora) – `dnf install package`
You Should Know:
- Automate tasks with cron jobs (
crontab -e):/path/to/script.sh
- Compress files efficiently:
tar -czvf archive.tar.gz /folder
- Find files quickly:
find / -name "filename" -type f
- Check open ports:
ss -tuln
What Undercode Say:
Mastering these Linux commands enhances productivity for sysadmins, developers, and cybersecurity professionals. Regular practice ensures efficiency in real-world scenarios.
Expected Output:
A well-structured cheat sheet for Linux commands, optimized for daily IT and cybersecurity tasks.
Prediction:
As Linux remains dominant in servers and cloud environments, proficiency in CLI will continue to be a critical skill for IT professionals.
IT/Security Reporter URL:
Reported By: Archana Chaudhary – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
