You don’t need to be a sysadmin to work comfortably in Linux. But as a developer, knowing the right 20% of commands will save you hours of clicking and debugging. Let’s cut the fluff. Here are the essential Linux commands I use daily. Navigation & Inspection bash pwd # Where am I? ls -la # List all files (including hidden) with details cd project/ # Move into directory cd .. # Go back one level cd ~ # Go home Dev tip: Use ls -la | grep keyword to filter files. File Operations (You’ll use these constantly) bash touch index.js # Create empty file cat file.txt # Print entire file to terminal head -20 app.log # First 20 lines of log tail -f app.log # Follow live log output (critical for debugging) cp -r src/ backup/ # Copy folder recursively mv oldname.js newname.js # Rename or move rm file.txt # Delete file (careful!) rm -rf node_modules/ # Delete folder (double careful!) Process Management bash ps aux # List all running processes ps aux | grep node # Find Node processes kill -9 1234 # Force kill process…