How can stopped appium server from command line

[Appium] Welcome to Appium v1.22.1
[HTTP] Could not start REST http interface listener. The requested port may already be in use. Please make sure there is no other instance of this server running already.
Fatal Error: listen EADDRINUSE: address already in use
at Server.setupListenHandle [as _listen2] (net.js:1313:16)
at listenInCluster (net.js:1361:12)
at doListen (net.js:1498:7)
at processTicksAndRejections (internal/process/task_queues.js:85:21)

  1. you can kill any app by port
  2. you can just start new appium with --session-override flag. more to read ->

what it on 4723 port? previous appium server?