To find a Node.js app running and kill it, we run the ps and kill commands.
To find the node process number, we run
$ ps -e | grep node
with ps.
We find the node process with grep.
And then we run
$ kill -9 132
to run kill to kill the process with ID 132 where 132 is returned by ps -e | grep node.
We replace this with the actual ID of the process.
