查看进程号占用的端口号

netstat -tulnpe

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       User       Inode      PID/Program name    
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      root       12345      1234/nginx: master  
udp        0      0 0.0.0.0:5353            0.0.0.0:*                           root       67890      5678/dnsmasq       

sudo netstat -tulnpe

sudo ss -tulnpe

import socket
import subprocess

def find_pid_by_port(port):
    try:
        result = subprocess.run(['netstat', '-tulnpe'], capture_output=True, text=True)
        lines = result.stdout.split('\n')
        for line in lines:
            if f':{port} ' in line:
                parts = line.split()
                pid_program = parts[-1]
                pid = pid_program.split('/')[0]
                return pid
        return None
    except Exception as e:
        print(f"Error: {e}")
        return None

port = 80
pid = find_pid_by_port(port)
if pid:
    print(f"Process ID using port {port}: {pid}")
else:
    print(f"No process found using port {port}")