kill any process occupying a port. unix-first, zero-zombie, one command.

npx cli-killport 3000

1. finds every process bound to the given port (lsof, fuser, ss)
2. shows you what it found — pid, name, user, command, state, children
3. kills the entire process tree bottom-up (children first, parent last)
4. sends SIGTERM → brief grace → SIGKILL (-9) → kills process group
5. reaps zombie children by signaling parent processes
6. verifies the port is actually free before exiting

# use directly with npx (no install needed)
npx cli-killport 1420

# or install globally
npm i -g cli-killport
killport 1420

# short alias
kp 1420

killport <port> [options]

killport 1420          # kill whatever is on port 1420
killport 3000          # free up port 3000
kp 5173                # short alias
npx cli-killport 8080  # no install needed

• macOS — first-class support via lsof
• Linux — lsof → fuser → ss fallback chain

because lsof -i :1420 | awk '{print $2}' | tail -1 | xargs kill -9 is not a real workflow. and it leaves zombie children behind.

MIT