server.js

var sys = require('sys')
var exec = require('child_process').exec;
var fs = require('fs');
var filepath = "/home/root/count.txt";
read();
function read() {
	fs.readFile(filepath, function( err, data ) {
		if( err ) {
			console.log( "read error" , err );
			return;
		}
		write(parseInt(data.toString(), 10));
	});
}
function write(count) {
	fs.writeFile(filepath, count+1, function(err) {
		if( err ) {
			console.log( "read error" , err );
			return;
		}
		shutdown();
	}
}
function shutdown() {
	exec("shutdown -r now", function puts(error, stdout, stderr) {
		console.log( stdout, stderr );
		sys.puts(stdout);
	});
}