Error: listen EADDRINUSE: address already in use 0.0.0.0:3500 code example

Example 1: 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

Example 2: EADDRINUSE: address already in use

sudo lsof -i :
kill -9 

Example 3: Error: listen EADDRINUSE: address already in use :::31641

ps aux | grep node //gets all the nodes and list of PID
kill -9 {PID}

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