如何查看程序占用端口号

netstat -ano

Get-NetTCPConnection | Where-Object { $_.LocalAddress -eq '0.0.0.0' } | Select-Object LocalPort, OwningProcess

sudo netstat -tulnp

sudo ss -tulnp

sudo lsof -i :<端口号>

import socket

def find_port(ip, port):
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        result = s.connect_ex((ip, port))
        if result == 0:
            print(f"Port {port} is in use.")
        else:
            print(f"Port {port} is free.")

find_port('127.0.0.1', 8080)

const net = require('net');

function checkPort(ip, port, callback) {
    const server = net.createServer();

    server.once('error', (err) => {
        if (err.code === 'EADDRINUSE') {
            callback(true); // Port is in use
        }
    });

    server.once('listening', () => {
        server.close();
        callback(false); // Port is free
    });

    server.listen(port, ip);
}

checkPort('127.0.0.1', 8080, (inUse) => {
    console.log(inUse ? 'Port is in use.' : 'Port is free.');
});