node.js在linux下表达权限错误

Question

使用admin用户帐户使用arch

var express = require('express');
var fs = require('fs');
var app = express();
app.get('/lol', function(req, res) {
res.sendFile('second.html', {root: __dirname })
});
var port = process.env.PORT || 81;
var server = app.listen(port);

我得到这个错误，没有改变，当我改变端口或url来触发它它立即给我这个错误后，我运行命令:node site.js(上面的代码是site.js)

node:events:371
throw er; // Unhandled 'error' event
^
Error: listen EACCES: permission denied 0.0.0.0:81
at Server.setupListenHandle [as _listen2] (node:net:1302:21)
at listenInCluster (node:net:1367:12)
at Server.listen (node:net:1454:7)
at Function.listen (/home/{name}/node_modules/express/lib/application.js:618:24)
at Object.<anonymous> (/home/{name}/Documents/web/demo/site.js:10:18)
at Module._compile (node:internal/modules/cjs/loader:1101:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
at Module.load (node:internal/modules/cjs/loader:981:32)
at Function.Module._load (node:internal/modules/cjs/loader:822:12)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:79:12)
Emitted 'error' event on Server instance at:
at emitErrorNT (node:net:1346:8)
at processTicksAndRejections (node:internal/process/task_queues:83:21) {
code: 'EACCES',
errno: -13,
syscall: 'listen',
address: '0.0.0.0',
port: 81
}

如果我用sudo运行脚本，它可以正常工作，但我不想在sudo中运行它因为我必须在没有sudo的服务器上运行它。任何帮助吗?

Answer 1

在没有root权限的情况下使用1024以下的端口是常见问题。