Some useful commands came across while having fun

[Windows] Delete folders recursively 

• rmdir /s [directory_name]

[Windows] Which ports being used by what apps, and vice versa

• netstat -aon | findstr '[port_number]'. 
• If the port is being used by any application, then that application’s detail will be shown with PID as the last column
• tasklist | findstr '[PID]'. Replace the [PID] with above
• Follow the inverse odder to track which application uses which ports too

[Windows] grep a file content. /N is for showing line numbers 

• type test.txt | findstr /N "text you wanna search in test.txt"

• npm list -g | grep express
• curl -d '{"key1":"value1", "key2":"value2"}' -H "Content-Type: application/json" -X POST http://localhost:3000/data 
• curl -d "param1=value1&param2=value2" -X POST http://localhost:3000/data (POST application/x-www-form-urlencoded)
• curl -d "@data.json" -X POST http://localhost:3000/data (with data file) 

[Mac] 

• Removes all .git files/folders -> $ find . | grep .git | xargs rm -rf