How to avoid ‘Port 4200 is already in use’ error with Angular-CLI

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Step 1: Find the connection’s PID

> netstat -ano | findstr :yourPortNumber
Then locate the PID (something like 10764)

Step 2: Kill the process using it’s PID

> tskill yourPID
Example:
tskill 10764

Step 3: Restart your server

You should be able to run it (using ng serve)

Step 4: Stop your server properly

Don’t forget now to close properly your server by using Ctrl + C and typing Y:

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