Error: Port 5601 is already in use. Another instance of Kibana may be running!--Sometime it's working sometime not if it is not worked then i restart my pc then it's worked

I already kill port 5601 and also reinstall kibana but still not working

log   [10:32:00.035] [info][plugins-service] Plugin "metricsEntities" is disabled.
  log   [10:32:00.161] [fatal][root] Error: Port 5601 is already in use. Another instance of Kibana may be running!
    at Root.shutdown (/home/harsh/Downloads/kibana-7.16.3-linux-x86_64/src/core/server/root/index.js:81:18)
    at Root.preboot (/home/harsh/Downloads/kibana-7.16.3-linux-x86_64/src/core/server/root/index.js:50:18)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at bootstrap (/home/harsh/Downloads/kibana-7.16.3-linux-x86_64/src/core/server/bootstrap.js:99:9)
    at Command.<anonymous> (/home/harsh/Downloads/kibana-7.16.3-linux-x86_64/src/cli/serve/serve.js:229:5)

 FATAL  Error: Port 5601 is already in use. Another instance of Kibana may be running!

Can you paste the output of netstat -tunlp | grep 5601 , there could be another instance of kibana running like the error says

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Thank you gorbroth for your replay,
i am sucked with .tar file of Elasticsearch then i installed deb format of Elasticsearch Now it's proper working.

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