There's a nice utility that you can use to kill a process based on the port it's listening to, so for example if you have a server listening on port 80, you can run $ fkill :80 and it will murder it.

Only problem, it's made using Javascript, but if you're OK with having Node and plain-text JS files in your bin folder, you can install it with $ npm install --global fkill-cli.

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