I\'ve been doing web development with Angular2 and have been using both Angular2 and Firebase to run local servers. I haven\'t been able to find a command similar to typing quit
If you cannot see the "ng serve" command running, then you can do the following on Mac OSX (This should work on any Linux and Uni software as well).
ps -ef | grep "ng serve"
From this, find out the PID of the process and then kill it with the following command.
kill -9