monkey.js

var fs = require("fs");

var dest    = "./test.log";
var stream  = fs.createWriteStream(dest, {flags: 'a'});
var newcons = new console.Console(stream, stream);
// all the stuff documented at https://nodejs.org/api/console.html
[
    'log', 'info', 'error', 'warn', 'dir',
    'time', 'timeEnd', 'trace', 'assert'
].forEach(function (n) {
    console[n] = newcons[n];
});

console.log("OHAI");