Find process running on port

Find process running on port in Windows

• GUI software: CurrPorts: Monitoring TCP/IP network connections on Windows
• GUI software: Windows 的 TCPView - Windows Sysinternals | Microsoft Docs
• Command: netstat –na | find "<PORT>" e.g. netstat –na | find "4444" or netstat -a | find "3306" (note: require the double quote symbol, not single quote symbol) for Win
• Command to kill: kill-port - npm

Find process running on port in Mac/Linux

• macOS
  • netstat -vanp tcp | grep 4444 or
  • lsof -i tcp:4444 or lsof -i :4444
  • sudo lsof -i -P | grep LISTEN | grep :$PORT

• Linux
  • nmap "Network exploration tool and security / port scanner." e.g. nmap -p 80,443 ip
  • ss "utility to investigate sockets" e.g. ss -tnlp | grep 80 or using OR operator ss -tnlp | grep '80\|443'
  • ps List the current processes. Input ps -aux | grep "PORT_NUMBER" e.g. ps -aux | grep 443
  • netstat Command netstat -tulpn | grep LISTEN e.g.
  • docker port | Docker Documentation

Find process running on port in Windows

• Linux CentOS7:
  • netstat -na | grep ":<port>" e.g. sudo netstat -pan | grep ":80" or
  • ps -elf | grep <port>

## windows
## After running process on windows, and then input the command: netstat –na | find "4444"
  TCP    0.0.0.0:4444           0.0.0.0:0              LISTENING
  TCP    [::]:4444              [::]:0                 LISTENING

## mac
## After running process on mac, and then input the command: netstat -vanp tcp | grep 4444
tcp46      0      0  *.4444                 *.*                    LISTEN      131072 131072  15476      0 0x0000 0x00000006
tcp4       0      0  127.0.0.1.54419        127.0.0.1.4444         TIME_WAIT   408300 146988  15476      0 0x2031 0x00000000

## mac
## After running process on mac, and then input the command: lsof -i tcp:4444
COMMAND   PID  USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
java    15476 user    8u  IPv6 0x8eb77926a50f8a53      0t0  TCP *:krb524 (LISTEN)

## Liunx
## After running process on mac, and then input the command: sudo netstat -pan | grep ":80"
tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      23370/python3
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      23025/nginx: master
tcp6       0      0 :::80                   :::*                    LISTEN      23025/nginx: master
tcp6       0      0 :::8000                 :::*                    LISTEN      22001/docker-proxy  

問題排除

FIND: 參數格式不正確

問題: Win netstat –na | find 4444 輸入後遇到「FIND: 參數格式不正確」錯誤訊息。

解決方式: 請將 <port> 加上雙引號，例如: netstat –na | find "4444"

相關資料

• 程式扎記: (Windows 技巧) windows常用網路管理指令 - netstat
• macos - Find (and kill) process locking port 3000 on Mac - Stack Overflow
• sockets - How to find all the listening port in PHP? - Stack Overflow
• List open ports and listening services
• Linux / UNIX Find Out What Program / Service is Listening on a Specific TCP Port
• 解決 Python Flask 網站伺服器無法啟動的問題 [Mac M1]