How to Solve Node start error listen eacces

Error Message:
events. js:141
throw er; // Unhandled ‘error’ event
Error: listen EACCES
at Object.exports. _errnoException (util.js:870:11)
at exports. _exceptionWithHostPort (util.js:893:20)
at Server. _listen2 (net.js:1224:19)
at listen (net.js:1273:10)
at net. js:1382:9
at nextTickCallbackWith3Args (node.js:452:9)
at process. _tickCallback (node.js:358:17)
at Function.Module.runMain (module.js:444:11)
at startup (node.js:136:18)
at node.js:966:3

1. one is the port is occupied
2. sudo node xx. js — root privileges are required to access ports below 1024


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