Kill Port

Check which processes are using specific ports and optionally kill them.

Instructions

1. Ask the user which port(s) they want to check (e.g., 3000, 8080, etc.)
2. For each port, run lsof -i :<port> to check what's using it
3. If nothing is using the port, inform the user
4. If something is using the port, show:
   • The process name (COMMAND)
   • The PID
   • The user running it
   • Full command details
5. Ask if they want to kill the process(es)
6. If yes, use kill -9 <PID> to terminate the process
7. Verify the process was killed by running lsof -i :<port> again

Common Ports to Check

• 3000 (Next.js default)
• 4001 (Lighthouse)
• 8080 (Backend services)
• 5432 (PostgreSQL)
• 6379 (Redis)
• 9090 (Prometheus)

Safety Notes

• Always show what will be killed before killing
• Warn if the process is owned by another user
• Use kill -9 (SIGKILL) only after confirmation
• Suggest trying kill <PID> (SIGTERM) first for graceful shutdown if appropriate