-parser.add_option('-p', '--period', action='store', dest='period', default=900, help='Polling interval (sec)')
+parser.add_option('-p', '--period', action='store', dest='period', default=600, help='Polling interval (sec)')
+parser.add_option('-r', '--random', action='store', dest='random', default=301, help='Range for additional random polling interval (sec)')
+parser.add_option('-v', '--verbose', action='store_true', dest='verbose', default=False, help='more verbose log')
+parser.add_option('-P', '--path', action='store', dest='path', default='/usr/share/NodeManager/plugins', help='Path to plugins directory')
+parser.add_option('-m', '--module', action='store', dest='module', default='', help='run a single module among '+' '.join(known_modules))