“Port 4200 is already in use” when running the ng serve command

Question

I am learning angular 2 and for the first time I am using the angular CLI project to create a sandbox project.

I was able to run the command \"ng serve\" and it wor

Answer 1

In my case none of the above mentioned worked.

UBUNTU 18.04 VERSION

Below command worked.

sudo kill -9 $(lsof -i tcp:4200 -t)