windows 查看進程占用的端口號

tasklist

查看當前運行的進程

netstat

netstat -ano | findStr PID

查看某個進程占用了哪些端口

  TCP    127.0.0.1:2436         127.0.0.1:9999         ESTABLISHED     22588
  TCP    127.0.0.1:8080         0.0.0.0:0              LISTENING       22588
  TCP    127.0.0.1:8080         127.0.0.1:2476         ESTABLISHED     22588
  TCP    127.0.0.1:8080         127.0.0.1:2477         ESTABLISHED     22588
  TCP    127.0.0.1:8080         127.0.0.1:2478         ESTABLISHED     22588
  TCP    127.0.0.1:8080         127.0.0.1:2496         ESTABLISHED     22588
  TCP    192.168.231.137:2307   111.231.95.102:443     ESTABLISHED     22588
  TCP    192.168.231.137:2332   118.126.69.64:443      ESTABLISHED     22588
  TCP    192.168.231.137:2400   10.23.24.4:3128        ESTABLISHED     22588
  TCP    192.168.231.137:2405   10.23.24.4:3128        ESTABLISHED     22588
  TCP    192.168.231.137:2459   10.23.24.4:3128        ESTABLISHED     22588
  TCP    192.168.231.137:2460   10.23.24.4:3128        ESTABLISHED     22588
  TCP    192.168.231.137:2461   10.23.24.4:3128        ESTABLISHED     22588
  TCP    192.168.231.137:2462   10.23.24.4:3128        ESTABLISHED     22588
  TCP    192.168.231.137:2463   10.23.24.4:3128        ESTABLISHED     22588

netstat -ano | findStr [端口號]

查看某個端口被哪個進程占用
netstat -ano | findStr 2436

  TCP    127.0.0.1:2436         127.0.0.1:9999         ESTABLISHED     22588
  TCP    127.0.0.1:9999         127.0.0.1:2436         ESTABLISHED     12308

這里pid為22588的進程和pid為12308建立了本地tcp連接，分別占用了端口2436和9999,第四列是tcp的狀態，描述三次握手，四次揮手和連接完成等狀態，詳情可參考：https://www.cnblogs.com/jessezeng/p/5617105.html

題外話，在mac上，我們可以使用lsof -i :3000來達到同樣的效果。

taskkill

例如:
TASKKILL /IM notepad.exe
TASKKILL /PID 1230 /PID 1241 /PID 1253 /T
TASKKILL /F /IM cmd.exe /T
TASKKILL /F /FI "PID ge 1000" /FI "WINDOWTITLE ne untitle"
TASKKILL /F /FI "USERNAME eq NT AUTHORITY\SYSTEM" /IM notepad.exe
TASKKILL /S system /U 域\用戶名 /FI "用戶名 ne NT" /IM *
TASKKILL /S system /U username /P password /FI "IMAGENAME eq note*"