查看程序使用的端口

netstat -ano

netstat -tuln

ss -tuln

import socket

def get_used_ports():
    used_ports = []
    for conn in socket.get_connections():
        used_ports.append(conn.laddr.port)
    return used_ports

print(get_used_ports())

const net = require('net');

function getUsedPorts() {
    const usedPorts = [];
    const server = net.createServer();
    server.on('listening', () => {
        usedPorts.push(server.address().port);
        server.close();
    });
    server.listen(0); // 0 means any available port
    return new Promise(resolve => server.once('close', () => resolve(used_ports)));
}

getUsedPorts().then(console.log);