deleteJars: function(appDir, version, callback) {
    fs.readFile('/file/location', function(err, data) {

        if(err) throw err;
        var array = data.toString().split("n");
        for(i in array) {
            if (array[i].indexOf('worker') > -1){

                var ip = array[i].split(" ");
                var ssh = new SSH2Utils();
                var server = {
                  host: ip[0],
                  username: username,
                  password: password
                };
                var myfiles = ssh.exec(server, 'rm ' + appDir + '/' + version + '/jars/myjar*.jar', function(err,stdout,stderr, server, conn, response){
                    if(err) console.log('No jars to delete');
                    conn.end();
                    callback(response);
                });
            }
        }
    });
  }

runningService.deleteJars(appDir, version, function() {