Kill a process from the cmd on windows

kill-process.bash

## Start cmd as admin
netstat -ano | findstr :3000 # r specify other port number

## Then get the processID from the previous command
taskkill /PID typeyourPIDhere /F # replace 'typeyourPIDhere' with appropraite process ID

## UBUNTU ##

You want to use backtick not regular tick:

sudo kill -9 `sudo lsof -t -i:9001`

If that doesn't work you could also use $() for command interpolation:

sudo kill -9 $(sudo lsof -t -i:9001)