Create linux-commands-cheatsheet.md with command list

2026/day-03/linux-commands-cheatsheet.md

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+# Day 03 – Linux Commands Practice
+
+## Task
+Today’s goal is to **build your Linux command confidence**.
+
+Process Management
+ps - Display running processes 
+ps -ef - Show all running processes 
+top - Monitor system processes in real time 
+htop - Interactive process viewer 
+kill PID - Terminate a process by PID 
+kill -9 PID - Forcefully terminate a process 
+pkill process_name - Kill process by name 
+jobs - List background jobs 
+bg - Resume a job in the background 
+fg - Bring a background job to the foreground
+
+
+- File system
+pwd - Print current working directory  
+ls - List files and directories 
+ls -la - List all files including hidden files 
+cd directory - Change directory
+mkdir folder - Create a directory 
+touch file.txt - Create a new file 
+cp source destination - Copy files 
+mv source destination - Move or rename files 
+rm file.txt - Delete a file 
+rm -r folder - Delete a directory recursively 
+cat file.txt - Display file contents 
+nano file.txt - Edit a file 
+find . -name file.txt - Search for a file 
+df -h - Show disk usage 
+du -sh * - Show directory sizes 
+
+
+- Networking troubleshooting
+
+ip addr - Display IP addresses 
+hostname -I - Show local IP address 
+ping google.com - Test network connectivity 
+curl https://example.com - Test HTTP connectivity 
+wget URL - Download a file 
+ssh user@host - Connect to a remote server 
+ss -tuln - Display listening ports 
+netstat -tuln - Show network connections (if installed) 
+traceroute google.com - Trace network path  
+dig google.com - Query DNS information 
+
+
+