Error: listen EADDRINUSE: address already in use :::3000
sudo lsof -i :3000
                                
                            Error: listen EADDRINUSE: address already in use :::3000
sudo lsof -i :3000
                                
                            Error: listen EADDRINUSE: address already in use :::3000
//To find the process id (PID) associated with the port
lsof -i tcp:3000 
COMMAND PID   USER  FD  TYPE DEVICE             SIZE/OFF NODE NAME 
node    44475 chen5 31u IPv4 0x8b1721168764e4bf 0t0 TCP *:strexec-s (LISTEN)
//Then to kill the process
kill -9 44475
                                
                            Error: listen EADDRINUSE: address already in use :::3000
ps aux | grep node
kill -9 PID
                                
                            Uncaught Error: listen EADDRINUSE: address already in use 0.0.0.0:3000
C:\Users\admin>netstat -ano|findstr "PID :3000"
taskkill /pid 18264 /f
                                
                            string to number js
var myInt = parseInt("10.256"); //10
var myFloat = parseFloat("10.256"); //10.256
                                
                            how to change a string to number in javascript
let theInt = parseInt("5.90123"); //5
let theFloat = parseFloat("5.90123"); //5.90123
                                
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