Fix for corrupt Dropbear host file for BeagleBone

Dropbear Key Reset for BeagleBone.js

// Fix for corrupt Dropbear host file, found via http://nucleussystems.com/blog/ssh-on-the-beaglebone-black/
// Run in the Cloud9 IDE at 192.168.7.2:3000

var fs = require('fs');
var destroyed_key_file = '/etc/dropbear/dropbear_rsa_host_key';

fs.readFile(destroyed_key_file, function(err, data) {
    if (err) throw err;

    if (data === null || data.length === 0) {
        console.log("we have a corrupted host key file... try do delete it");
        fs.unlink(destroyed_key_file, function(err) {
            if (err) throw err;
            console.log('successfully deleted ' + destroyed_key_file);
            console.log('you should now reboot your beaglebone.');
            console.log('the /etc/init.d/dropbear script will create a new rsa host key file for you.');
            console.log('after the reboot you should be able to login over ssh');
        });
    } else {
        console.log("it seems that you have another problem, sorry");
    }
});