Terminal Sorcery 🧙‍♂️

Mastering the command line is a superpower. Learn the spells to control your system like a true wizard.

File Manipulation

            ls -lah # List all files with permissions & sizes
            cp -r src dst # Copy directory recursively
            mv file new # Rename or move file
            rm -rf dir # Force remove directory (Careful!)
            chmod +x file # Make a file executable
            chown user:grp file # Change ownership
        

System Monitoring

            htop # Interactive process viewer (better than top)
            df -h # Disk space in human-readable format
            free -h # Memory usage
            watch -n 1 "nvidia-smi" # Monitor GPU usage in real-time
        

Networking & Pipes

            ip a # Show IP addresses
            ping 1.1.1.1 # Check connectivity
            curl -I url # Fetch HTTP headers

            # The Power of Pipes (|)
            cat file.txt | grep "error" # Find "error" in file
            ps aux | grep "python" # Find running python processes
        

Productivity Tricks

            !! # Run the last command again
            sudo !! # Run the last command with sudo
            ctrl + r # Search command history
            alias ll="ls -lah" # Create a shortcut
        

Pro Tip: Install tldr (e.g., sudo apt install tldr) for simplified man pages. Just type tldr tar to see examples!